{"id":14242,"date":"2024-04-15T08:00:42","date_gmt":"2024-04-15T02:30:42","guid":{"rendered":"https:\/\/wordpress-505192-1602719.cloudwaysapps.com\/?p=14242"},"modified":"2024-04-16T16:35:12","modified_gmt":"2024-04-16T11:05:12","slug":"samacheer-kalvi-12th-chemistry-solutions-chapter-13","status":"publish","type":"post","link":"https:\/\/samacheerkalviguru.com\/samacheer-kalvi-12th-chemistry-solutions-chapter-13\/","title":{"rendered":"Samacheer Kalvi 12th Chemistry Solutions Chapter 13 Organic Nitrogen Compounds"},"content":{"rendered":"

Are you searching for the Samacheer Kalvi 12th Chemistry Chapter Wise Solutions PDF? Then, get your Samacheer Kalvi 12th Chapter Wise Solutions PDF for free on our website. Students can Download Chemistry Chapter 13 Organic Nitrogen Compounds Questions and Answers, Notes Pdf, Samacheer Kalvi 12th Chemistry Solutions<\/a> Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations.<\/p>\n

Tamilnadu Samacheer Kalvi 12th Chemistry Solutions Chapter 13 Organic Nitrogen Compounds<\/h2>\n

All concepts are explained in an easy way on our website. So, students can easily learn and practice Tamilnadu State Board 12th Chemistry Chapter 13 Organic Nitrogen Compounds Question and Answers. You can enjoy the digitized learning with the help of the Tamilnadu State Board Chemistry Online Material.<\/p>\n

Samacheer Kalvi 12th Chemistry Chapter 13 Organic Nitrogen Compounds Text Book Evaluation<\/h3>\n

Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen <\/strong><\/span>Compounds<\/strong><\/span>\u00a0<\/span>Multiple Choice Questions<\/strong><\/span><\/p>\n

Question 1.
\nWhich of the following reagent can be used to convert nitrobenzene to aniline?
\n(a) Sn \/ HCl
\n(b) ZnHg \/ NaOH
\n(c) LiAIH4<\/sub>
\n(d) All of these
\nAnswer:
\n(a) Sn \/ HCl<\/p>\n

Question 2.
\nThe method by which aniline cannot be prepared is ……………
\n(a) degradation of benzamide with Br2<\/sub> \/ NaOH
\n(b) potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution.
\n(c) Hydrolysis of phenylcyanide with acidic solution
\n(d) reduction of nitrobenzene by Sn \/ HCI
\nAnswer:
\n(b) potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution.<\/p>\n

Question 3.
\nWhich one of the following will not undergo Hofmann bromamide reaction?
\n(a) CH3<\/sub>CONHCH3<\/sub>
\n(b) CH3<\/sub>CH2<\/sub>CONH2<\/sub>
\n(c) CH3<\/sub>CONH2<\/sub>
\n(d) C6<\/sub>H5<\/sub>CONH2<\/sub>
\nAnswer:
\n(a) CH3<\/sub>CONHCH3<\/sub>
\nOnly primary amides undergo hoffmann bromamide reaction<\/p>\n

Question 4.
\nAssertion : Acetamide on reaction with KOH and bromine gives acetic acid
\nReason : Bromine catalyses hydrolysis of acetamide.
\n(a) if both assertion and reason are true and reason is the correct explanation of assertion,
\n(b) if both assertion and reason are true but reason is not the correct explanation of assertion.
\n(c) assertion is true but reason is false
\n(d) both assertion and reason are false
\nAnswer:
\n(d) both assertion and reason are false<\/p>\n

Question 5.
\n\"Samacheer
\n(a) bromomethane
\n(b) a – bromo sodium acetate
\n(c) methanamine
\n(d) acetamide
\nAnswer:
\n(c) methanamine
\n\"Samacheer<\/p>\n

Question 6.
\nWhich one of the following nitro compounds does not react with nitrous acid?
\n\"Samacheer
\nAnswer:
\n(c) (CH3<\/sub>)3<\/sub>CNO2<\/sub> – 30<\/sup> nitroalkane<\/p>\n

Question 7.
\n\"Samacheer this reaction is known as ………………
\n(a) Friedel – crafts reaction
\n(b) HVZ reaction
\n(c) Schotten – Baumann reaction
\n(d) none of these
\nAnswer:
\n(c) Schotten – Baumann reaction<\/p>\n

Question 8.
\nThe product formed by the reaction an aldehyde with a primary amine
\n(a) carboxylic acid
\n(b) aromatic acid
\n(c) schiff \u2018s base
\n(d) ketone
\nAnswer:
\n(c) schiff \u2018s base<\/p>\n

Question 9.
\nWhich of the following reaction is not correct.
\n\"Samacheer
\nAnswer:
\n\"Samacheer
\nP – nitrosation takes places, the product is \"Samacheer<\/p>\n

Question 10.
\nWhen aniline reacts with acetic anhydride the product formed is …………….
\n(a) o – aminoacetophenone
\n(b) m – aminoacetophcnone
\n(c) p – aminoacetophenone
\n(d) acetanilide
\nAnswer:
\n(d) acetanilide
\n\"Samacheer<\/p>\n

Question 11.
\nThe order of basic strength for methyl substituted amine solution is ………….
\n(a) N(CH3<\/sub>)3<\/sub> > N(CH3<\/sub>)2<\/sub>H > N(CH3<\/sub>)H2<\/sub> > NH3<\/sub>
\n(b) N(CH3<\/sub>)H2<\/sub> > N(CH3<\/sub>)2<\/sub>H > N(CH3<\/sub>)3<\/sub> > NH3<\/sub>
\n(c) NH3<\/sub> > N(CH3<\/sub>)H2<\/sub> > N(CH3<\/sub>)2<\/sub>H > N(CH3<\/sub>)3<\/sub>
\n(d) N(CH3<\/sub>)2<\/sub>H > N(CH3<\/sub>)H2<\/sub> > N(CH3<\/sub>)3<\/sub> > NH3<\/sub>
\nAnswer:
\n(d) N(CH3<\/sub>)2<\/sub>H > N(CH3<\/sub>)H2<\/sub> > N(CH3<\/sub>)3<\/sub> > NH3<\/sub><\/p>\n

Question 12.
\n\"Samacheer
\n(a) H3<\/sub>PO2<\/sub> and H2<\/sub>O
\n(b) H+<\/sup> \/ H2<\/sub>O
\n(c) HgSO4<\/sub> \/ H2<\/sub>SO4<\/sub>
\n(d) Cu2<\/sub>Cl2<\/sub>
\nAnswer:
\n(a) H3<\/sub>PO2<\/sub> and H2<\/sub>O<\/p>\n

Question 13.
\n\"Samacheer
\n(a) C6<\/sub>H5<\/sub> – OH
\n(b) C6<\/sub>H5<\/sub> – CH2<\/sub>OH
\n(c) C6<\/sub> H5<\/sub> – CHO
\n(d) C6<\/sub>H5<\/sub>NH2<\/sub>
\nAnswer:
\n(a) C6<\/sub>H5<\/sub> – OH
\n\"Samacheer<\/p>\n

Question 14.
\nNitrobenzene on reaction with at 80 – 100\u00b0C forms which one of the following products?
\n(a) 1, 4 – dinitrobenzene
\n(b) 2, 4, 6 – tirnitrobenzene
\n(c) 1, 2 – dinitrobenzene
\n(d) 1, 3 – dinitrobenzene
\nAnswer:
\n(d) 1, 3 – dinitrobenzene
\n\"Samacheer<\/p>\n

Question 15.
\nC5<\/sub>H13<\/sub>N reacts with HNO2<\/sub> to give an optically active compound – The compound is …………..
\n(a) pentan – 1 – amine
\n(b) pentan – 2 – amine
\n(c) N,N – dimethylpropan – 2 – amine
\n(d) N – methylbutan – 2 – amine
\nAnswer:
\n(d) N – methylbutan – 2 – amine
\n\"Samacheer<\/p>\n

Question 16.
\nSecondary nitro alkanes react with nitrous acid to form …………..
\n(a) red solution
\n(b) blue solution
\n(c) green solution
\n(d) yellow solution
\nAnswer:
\n(b) blue solution<\/p>\n

Question 17.
\nWhich of the following amines does not undergo acetylation?
\n(a) t – butylamine
\n(b) ethylamine
\n(c) diethylamine
\n(d) triethylamine
\nAnswer:
\n(d) triethyl amine (3\u00b0amine)<\/p>\n

Question 18.
\nWhich one of the following is most basic?
\n(a) 2, 4 – dichloroaniline
\n(b) 2, 4 – dimethyl aniline
\n(c) 2, 4 – dinitroaniline
\n(d) 2, 4 – dibromoaniline
\nAnswer:
\n(b) 2, 4 – dimethyl aniline
\nCH3<\/sub> is a +1 group, all other – I group. +1 group increase the electron density on NH2<\/sub> and hence increases the basic nature.<\/p>\n

Question 19.
\nWhen
\n\"Samacheer
\nis reduced with Sn \/ HCI the pair of compounds formed are ………..
\n(a) Ethanol, hydrozylamme hydrochloride
\n(b) Ethanol, ammonium hydroxide
\n(c) Ethanol, NH2<\/sub>OH
\n(d) C3<\/sub>H5<\/sub>NH2<\/sub>, H2<\/sub>O
\nAnswer:
\n(a) Ethanol, hydrozylamine hydrochloride<\/p>\n

Question 20.
\nTUPAC name for the amine
\n\"Samacheer is ………………
\n(a) 3 – Bimethylamino – 3 – methyl pentane
\n(b) 3 (N,N – Triethyl) – 3 – amino pentane
\n(c) 3 – N, N – trimethyl pentanamine
\n(d) 3 – (N, N – Dimethyl amino) – 3 – methyl pentane
\nAnswer:
\n(d) 3 – (N, N – Dimethyl amino) – 3 – methyl pentane<\/p>\n

Question 21.
\n\"Samacheer
\nProduct ‘P’ in the above reaction is ………………
\n\"Samacheer
\nAnswer:
\n\"Samacheer<\/p>\n

Question 22.
\nAmmonium salt of bcnzoic acid is heated strongly and the product so formed is reduced and then treated with NaNO2<\/sub> \/ HCl at low temperature. The final compound formed is ……………
\n(a) Benzene diazonium chloride
\n(b) Benzyl alcohol
\n(c) Phenol
\n(d) Nitrosobenzene
\nAnswer:
\n(b) Benzyl alcohol
\n\"Samacheer<\/p>\n

Question 23.
\nIdentify X in the sequence give below.
\n\"Samacheer + Methanoic acid
\n\"Samacheer
\nAnswer:
\n\"Samacheer<\/p>\n

Question 24.
\nAmong the following, the reaction that proceeds through an electrophilic substitution, is ……………..
\n\"Samacheer
\nAnswer:
\n\"Samacheer<\/p>\n

Question 25.
\nThe major product of the following reaction
\n\"Samacheer
\n\"Samacheer
\nAnswer:
\n\"Samacheer<\/p>\n

Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds Short Answer Questions<\/strong><\/span><\/p>\n

Question 1.
\nWrite down the possible isomers of lthe C4<\/sub>H9<\/sub>NO2<\/sub> give their IUPA names.
\nAnswer:
\n\"Samacheer
\n\"Samacheer<\/p>\n

Question 2.
\nThere are two isomers with the formula CH3<\/sub>NO2<\/sub>. How will you distinguish between them?
\nAnswer:
\nCH3<\/sub>NO2<\/sub> has two isomers. They are
\n1. CH3<\/sub> – NO2<\/sub> (Nitromethane)
\n2.
\n\"Samacheer<\/p>\n

Question 3.
\nWhat happens when<\/p>\n

    \n
  1. 2 – Nitropropane boiled with HCI<\/li>\n
  2. Nitrobenezen electrolytic reduction in strongly acidic medium.<\/li>\n
  3. Oxidation of tert – butylamine with KMnO4<\/sub><\/li>\n
  4. Oxidation of acetoneoxime with triuluoroperoxy acetic acid.<\/li>\n<\/ol>\n

    Answer:
    \n1. 2 – Nitropropane boiled with HCI:
    \n2 – nitropropane upon hydrolysis with boiling HCl give a ketone (2 – propanone) and nitrous oxide.
    \n\"Samacheer<\/p>\n

    2. Nitrobenezen electrolytic reduction in strongly acidic medium:
    \nElectrolytic reduction of nitrobenzene in weakly acidic medium gives aniline but in strongly acidic medium, it gives p – aminophenol obviously through the acid – cataLysed rearrangement of the initially formed phenyihydroxylamine.
    \n\"Samacheer<\/p>\n

    3. Oxidation of tert – butylamine with XMnO4<\/sub>:
    \nIn general, primary amines, in which the – NH2<\/sub> group is attached to a tertiary carbon can be oxidised with KMnO4<\/sub> to the corresponding nitro compound in excellent yield. Therefore 3\u00b0 – butylamine oxidised to give 2 – methyl – 2 – nitropropane.
    \n\"Samacheer<\/p>\n

    4. Oxidation ofacetoneoxime with trifluoroperoxy acetic acid:
    \nOxidation ofacetoneoxime with trifluoroperoxy acetic acid gives 2 – nitropropane.
    \n\"Samacheer<\/p>\n

    Question 4.
    \nHow will you convert nitrobenzene into<\/p>\n

      \n
    1. 1, 3, 5 – trinitrobenzene<\/li>\n
    2. o and p – nitrophenol<\/li>\n
    3. m – nitro aniline<\/li>\n
    4. azoxybenzene<\/li>\n
    5. hydrozabenzene<\/li>\n
    6. N – phenylhydroxylamine<\/li>\n
    7. aniline<\/li>\n<\/ol>\n

      Answer:
      \n1. Conversion of nitrobenzene into 1, 3, 5 – trinitrobenzene:
      \n\"Samacheer<\/p>\n

      2. Conversion of nitrobenzene into o and p – nitrophenol:
      \n(a) Method I:
      \nNitrobenzene heated with solid KOH at 340 K gives a low yield of a mixture of 0 – and P – nitrophenols.
      \n\"Samacheer<\/p>\n

      (b) Method II:
      \n\"Samacheer<\/p>\n

      3. Conversion of nitrobenzene into m – nitro aniline:
      \n\"Samacheer<\/p>\n

      4. Conversion of nitrobenzene into azoxybenzene:
      \n\"Samacheer<\/p>\n

      5. Conversion of nitrobenzene into hydrazobenzene:
      \n\"Samacheer<\/p>\n

      6. Conversion of nitrobenzene into N – phenylhydrozylamine:
      \n\"Samacheer<\/p>\n

      7. Conversin of nitrobenzene into aniline:
      \n\"Samacheer<\/p>\n

      Question 5.
      \nIdentify compounds A,B and C in the following sequence of reactions.
      \n\"Samacheer
      \n\"Samacheer
      \nAnswer:
      \n\"Samacheer
      \n\"Samacheer
      \n\"Samacheer
      \n\"Samacheer<\/p>\n

      Question 6.
      \nWrite short flotes on the following<\/p>\n

        \n
      1. Hoffmann\u2019s bromide reaction<\/li>\n
      2. Ammonolysis<\/li>\n
      3. Gabriel phthalimide synthesis<\/li>\n
      4. Schotten – Baumann reaction<\/li>\n
      5. Carbylamine reaction<\/li>\n
      6. Mustard oil reaction<\/li>\n
      7. Coupling reaction<\/li>\n
      8. Diazotisation<\/li>\n
      9. Gomberg reaction<\/li>\n<\/ol>\n

        Answer:
        \n1. Hoffmann\u2019s bromide reaction:
        \nWhen Amides are treated with bromine in the presence of aqueous or ethanolic solution of KOH, primary amines with one carbon atom less than the parent amides are obtained.
        \n\"Samacheer<\/p>\n

        2. Ammonolysis:
        \nWhen Alkyl halides (or) benzylhalides are heated with alcoholic ammonia in a sealed tube, mixtures of 1\u00b0, 2\u00b0 and 3\u00b0 amines and quaternary ammonium salts are obtained.
        \n\"Samacheer<\/p>\n

        3. Gabriel phthalimide synthesis:
        \nGabriel synthesis is used for the preparation of Aliphatic primary amines. Phthalimide on treatment with ethanolic KOH forms potassium salt of phthalimide which on heating with alkyl halide followed by alkaline hydrolysis gives primary amine.
        \n\"Samacheer<\/p>\n

        4. Schotten – Baumann reaction:
        \nAniline reacts with benzoylchloride (C6<\/sub>H5<\/sub>COCl) in the presence of NaOH to give N – phenyl benzamide. This reaction is known as Schotten Baumann reaction. The acylation and benzoylation are nucleophilic substitutions.
        \n\"Samacheer<\/p>\n

        5. Carbylamine reaction:
        \nAliphatic (or) aromatic primary amines react with chloroform and alcoholic KOH to give isocyanides (carbylamines), which has an unpleasant smell. This reaction is known as carbylamines test. This test used to identify the primary amines.
        \n\"Samacheer<\/p>\n

        5. Mustard oil reaction:
        \nWhen primary amines are treated with carbon disuiphide (CS2<\/sub>), N – alkyldithio carbonic acid is formed which on subsequent treatment with HgCI2<\/sub>, give an alkyl isothiocyanate.
        \n\"Samacheer<\/p>\n

        6. Coupling reaction:
        \nBenzene diazonium chloride reacts with electron-rich aromatic compounds like phenol, aniline to form brightly coloured azo compounds. Coupling generally occurs at the para position. If para position is occupied then coupling occurs at the ortho position. Coupling tendency is enhanced if an electron-donating group is present at the para – position to \"Samacheer\u00a0group. This is an electrophilic substitution.
        \n\"Samacheer<\/p>\n

        7. Diazotisation:
        \nAniline reacts with nitrous acid at low temperature (273 – 278 K) to give benzene diazonium chloride which is stable for a short time and slowly decompose seven at low temperatures. This reaction is known as diazotization.
        \n\"Samacheer<\/p>\n

        8. Gomberg reaction
        \nBenzene diazonium chloride reacts with benzene in the presence of sodium hydroxide to give biphenyl. This reaction in known as the Gomberg reaction.
        \n\"Samacheer<\/p>\n

        Question 7.
        \nHow will you distinguish between primary secondary and tertiary alphatic amines.
        \nAnswer:
        \n\"Samacheer<\/p>\n

        Question 8.
        \nAccount for the following<\/p>\n

          \n
        1. Aniline does not undergo Friedel – Crafts reaction<\/li>\n
        2. Diazonium salts of aromatic amines are more stable than those of aliphatic amines<\/li>\n
        3. pkb<\/sub> of aniline is more than that of methy lamine<\/li>\n
        4. Gabriel phthalimide synthesis is preferred for synthesising primary amines.<\/li>\n
        5. Ethylamine is soluble in water whereas aniline is not<\/li>\n
        6. Amines are more basic than amides<\/li>\n
        7. Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline.<\/li>\n<\/ol>\n

          Answer:
          \n1. Aniline does not undergo Friedel – Crafts reaction:
          \nAniline being a Lewis base reacts with Lewis acid AiCl3<\/sub> to form a salt.
          \n\"Samacheer
          \nDue to the presence of a positive charge on N – atom in the salt the group \"Samacheer\u00a0acts as a strongly deactivating group. As a result, it reduces the electron density in the benzene ring and which inhibits the electrophilic substitution reaction. Therefore aniline does not under go Friedel – Crafts reaction.<\/p>\n

          2. Diazonium salts of aromatic amines are more stable than those of aliphatic amines:
          \nThe diazonium salts of aromatic amines are more stable than those of aliphatic amines due to dispersal of the positive charge on the benzene ring as shown below.
          \n\"Samacheer<\/p>\n

          3. pKb<\/sub> of aniline is more than that of methylamine:
          \nIn aniline, the lone pair of electrons on the N – atom is delocalized over the benzene ring. As a result electron density on the nitrogen decreases. In contrast in CH3<\/sub>NH2<\/sub>, +I effect of CH3<\/sub> increases the electron density on the N-atom. Therefore, aniline is a weaker base than methylamine and hence its pK value is more than that of methyl amine.<\/p>\n

          4. Gabriel phthalimide synthesis is preferred for synthesising primary amines:
          \nGabriel phthalimide reaction gives pure 10 amine without any contamination of 2\u00b0 and 3\u00b0-amines. Therefore it is preferred for synthesising primary amines.
          \n\"Samacheer<\/p>\n

          5. Ethylamine is soluble in water whereas aniline is not:
          \nEthylamine when added to water forms intermolecular H – bonds with water. And therefore it is soluble in water. But aniline does not form H – bond with water to a very large extent due to the presence of a large hydrophobic – C6<\/sub>H5<\/sub> group. Hence, aniline is insoluble in water.
          \n\"Samacheer<\/p>\n

          6. Amines are more basic than amides:
          \nIn simple amines, the lone pair of electrons is on nitrogen and hence available for protonation. In amides on the other hand, the electron pair on nitrogen is delocalised to the carboxyl oxygen through resonance and thus it is not available for protonation. So amines are more basic than amides.
          \n\"Samacheer<\/p>\n

          7. Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline:
          \nNitration is usually carried out with a mixture of conc HNO3<\/sub> and conc H2<\/sub>SO4<\/sub>. In the presence of these acids, most of aniline gets protonated to form anilinium ion. Therefore, in the presence of acids, the reaction mixture consists of aniline and anilinium ion.<\/p>\n

          Now – NH2<\/sub>, group in aniline is O, P – directing and activating while the – NH3<\/sub> group is anilinium ion is meta – directing and deactivating. Whereas nitration of aniline (due to steric hindrance at o – position) mainly gives p-nitroaniline, the nitration of anilinium ion gives m – nitro aniline. In actual practice, approximately a 1 : 1 mixture of P and m – nitroaniline is formed.
          \n\"Samacheer<\/p>\n

          Question 9.
          \nArrange the following<\/p>\n

            \n
          1. In increasing order of solubility in water, C6<\/sub>H5<\/sub>NH2<\/sub>, (C2<\/sub>H5<\/sub>)2<\/sub>NH , C2<\/sub>H5<\/sub>NH2<\/sub><\/li>\n
          2. In increasing order of basic strength\n
              \n
            • aniline, p – toludine and p – nitroaniline<\/li>\n
            • C6<\/sub>H5<\/sub>NH2<\/sub>, C6<\/sub>H5<\/sub>NHCH3<\/sub>, C6<\/sub>H5<\/sub>NH2<\/sub>, p – Cl – C6<\/sub>H4<\/sub> – NH2<\/sub><\/li>\n<\/ul>\n<\/li>\n
            • In decreasing order of basic strength in gas phase.
              \nC2<\/sub>H5<\/sub>NH2<\/sub>, (C2<\/sub>H5<\/sub>)3<\/sub>NH , (C2<\/sub>H5<\/sub>)3<\/sub>N and NH3<\/sub><\/li>\n
            • In Increasing order of boiling point
              \nC2<\/sub>H5<\/sub>OH , (CH3<\/sub>)2<\/sub>NH, C2<\/sub>H5<\/sub>NH2<\/sub><\/li>\n
            • In decreasing order of the pKb<\/sub> values
              \nC2<\/sub>H5<\/sub>NH2<\/sub>, C6<\/sub>H5<\/sub>NHCH3<\/sub>, (C2<\/sub>H)2<\/sub>NH4<\/sub> and CH3<\/sub>NH2<\/sub><\/li>\n
            • Increasing order of basic strength C6<\/sub>H5<\/sub>NH2<\/sub>, C6<\/sub>H5<\/sub>N(CH3<\/sub>)2<\/sub>, (C6<\/sub>H5<\/sub>)2<\/sub>NH and CH3<\/sub>NH2<\/sub><\/li>\n
            • In decreasing order of basic strength
              \n\"Samacheer<\/li>\n<\/ol>\n

              Answer:
              \n1. Solubility decreases with increase in molecular mass of amines due to increase in the size of a hydrophobic hydrocarbon part and with decrease in the number of H – atoms on the N – atom which undergo H – bonding.<\/p>\n

              Now among the given compounds C6<\/sub>H5<\/sub>NH2<\/sub> has the highest molecular mass of 93 followed by (C2<\/sub>H5<\/sub>)2<\/sub>NH with molecular mass of 73 with C2<\/sub>H5<\/sub>NH2<\/sub> has the lowest molecular mass of 45. Thus the solubility increases in the order in which molecular mass decreases.<\/p>\n

              2. (a) The electron – donating groups increases the basic strength of amines while the electron – withdrawing groups decrease the basic strength of amines. Therefore p – nitroaniline is the weakest base followed by aniline while p – toluidine, which has methyl group and therefore it is the strongest base. Basic strength increases in the order. P – nitro aniline < aniline < p – toluidine<\/p>\n

              (b) Chlorine atom has both – I effect and + R effect since – I effect out weights the + R effect, therefore p – chloro aniline is weak base than aniline. Aikyl groups are electron – donating groups. ”<\/p>\n

              As a result the electron density on the nitrogen atom increases in the ethylamine and thus they can donate lone pair of electrons niore easily. Therefore Ethylamine is more base than aromatic amines.<\/p>\n

              Due to delocalization of lone pair of electrons of the N – atom over the benzene ring, C6<\/sub>H5<\/sub>NH, and C6<\/sub>H5<\/sub>NHCH3<\/sub> are far less basic than C2<\/sub>H5<\/sub>NH2<\/sub>. Further due to +1 effect of the CH3<\/sub> group, C6<\/sub>H5<\/sub>NHCH3<\/sub> is little more basic than C6<\/sub>H5<\/sub>NH2<\/sub>. Therefore increasing order basic strength is<\/p>\n

              3. In the gas phase, solvent effects i.e., stabilization of the conjugate acids due to H – bonding, are absent. Therefore, in the gas phase, basic strength mainly depends upon the +1 effect of the alkyl groups. Since the +1 effect increases with the number of ailcyl groups,<\/p>\n

              therefore the basic strength of the amines decreases as the number of ethyl groups decreases from three in (C2<\/sub>H5<\/sub>)3<\/sub>N to two in (C2<\/sub>H5<\/sub>)2<\/sub>NH to one in C2<\/sub>H5<\/sub>NH2<\/sub> and zero in NH3<\/sub>. Basic strength in the gas phase decreases in the order is,
              \n(C2<\/sub>H5<\/sub>)3<\/sub>N > (C2<\/sub>H5<\/sub>)2<\/sub>N > C2<\/sub>H5<\/sub>NH2<\/sub> > NH3<\/sub><\/p>\n

              4. Since the electro negativity of O is higher than that of N, therefore, alcohols form stronger H – 0bonds than amines. In other words, the boiling points of alcohols are higher than those of amines of comparable molecular masses. Therefore the boiling point of C2<\/sub>H5<\/sub>OH (46) is higher than those of (CH3<\/sub>)2<\/sub>NH (45) and C2<\/sub>H5<\/sub>NH2<\/sub> (45).<\/p>\n

              Further since the extent of H – bonding depends upon the number of H-atoms on the N-atom. Therefore 1\u00b0 – amines with two H – atoms on the N – atom have higher boiling points than 2\u00b0 – amines having only one H – atom. Therefore the boiling point of C2<\/sub>H5<\/sub>NH2<\/sub> is higher than that of(CH3<\/sub>)2<\/sub>NH. Increasing order of boiling point is,
              \n(CH3<\/sub>)2<\/sub>NH < C2<\/sub>H5<\/sub>NH < CH5<\/sub>OH<\/p>\n

              5. Due to delocalization of lone pair of electrons of the N – atom over the benzene ring, C6<\/sub>H5<\/sub>NHCH3<\/sub> is far less basic than C2<\/sub>H5<\/sub>NH2<\/sub>, (C6<\/sub>H5<\/sub>)2<\/sub>NH and CH3<\/sub>NH2<\/sub>. Among C2<\/sub>H5<\/sub>NH2<\/sub> and (C2<\/sub>H5<\/sub>), NH, (C2<\/sub>H5<\/sub>)2<\/sub>NH is more basic than C2<\/sub>H5<\/sub>NH2<\/sub> due to greater +1 effect of the two C2<\/sub>H5 groups and stabilization of its conjugate acid by H – bonding.<\/p>\n

              Compare to Ethyl and methyl group, C2<\/sub>H5<\/sub> – group has more +1 effect than CH3<\/sub> – group. Therefore methylamine is weak base than ethylamine. Combining all these facts the relative basic strength of these four amines decreases in the order.<\/p>\n

              (C2<\/sub>H5<\/sub>)2<\/sub>NH > C2<\/sub>H5<\/sub>NH2<\/sub> > CH3<\/sub>NH2<\/sub> > C6<\/sub>H5<\/sub>NHCH3<\/sub>. Since a stronger base has a lower pKb<\/sub> value therefore, pKb<\/sub> values decrease in the reverse order. C6<\/sub>H5<\/sub>NHCH3<\/sub> > CH3<\/sub>NH2<\/sub> > C2<\/sub>H5<\/sub>NH2<\/sub> > (C2<\/sub>H5<\/sub>)2<\/sub>NH<\/p>\n

              6. Due to delocalization of lone pair of electrons of the N-atom over the benzene ring, all aromatic amines are less basic than alkylamines i.e., CH3<\/sub>NH2<\/sub>. Presence of electron – donating groups ( – CH3<\/sub>) on the N – atom increases the basicity of substituted aniline with respect to C6<\/sub>H5<\/sub>NH2<\/sub>.<\/p>\n

              In (C6<\/sub>H5<\/sub>)2<\/sub>NH, the lone pair of electrons on the N – atom is delocalized over two benzene rings instead of one in C6<\/sub>H5<\/sub>NH2<\/sub>, therefore (C6<\/sub>H5<\/sub>)2<\/sub>NH is much less basic than C6<\/sub>H5<\/sub>NH2<\/sub>. Combining all the three trends together, the basic strength of the four amines increasing in the order.
              \n(C6<\/sub>H5<\/sub>)2<\/sub>NH < C6<\/sub>H5<\/sub>NH2<\/sub> < C6<\/sub>H5<\/sub>N (CH3<\/sub>)2<\/sub> < CH3<\/sub>NH,<\/p>\n

              7. Aliphatic amines are more basic than aromatic amines. Therefore CH3<\/sub>CH2<\/sub>NH2<\/sub> and CH3<\/sub>NH2<\/sub> are more basic. Among the ethylamine and methylamine. ethylamine was experienced more +1 effect than methylamine and hence ethylamine is more basic than methylamine.<\/p>\n

              Nitrogroup has a powerful electron withdrawing group and they have both – R effect as well as – I effect. As a result, all the nitro anilines are weaker bases than aniline. In P – nitroaniline
              \n\"Samacheer
              \nboth – R effect and – I effect of the NO2<\/sub> group decrease the basicity. Therefore decreasing order of basic strength is,
              \n\"Samacheer
              \nEthylamine > Methylamine > Aniline > p – nitro aniline<\/p>\n

              Question 10.
              \nHow will you prepare propan – 1 – amine from<\/p>\n

                \n
              1. butane nitrile<\/li>\n
              2. propanamide<\/li>\n
              3. 1 – nitropropane<\/li>\n<\/ol>\n

                Answer:
                \n1. Preparation of propan -1- amine from butane nitrile.
                \nButane nitrile treated with acid hydrolysis followed by Hoffmann\u2019s bromamide degradation. gives propan – 1 – amine.
                \n\"Samacheer<\/p>\n

                2. Preparation of propan – 1 – amine from propanamide.
                \nWhen propanamide is treated with LiAIH4<\/sub> in the presence of water gives propan – 1 – amine.
                \n\"Samacheer<\/p>\n

                3. Preparation of propan – 1 – amine from 1 – nitropropane.
                \n\"Samacheer
                \nReduction of 1 – Nitropropane using H2<\/sub> \/ Ni or Fe \/ HCl gives propan – 1 – amine.<\/p>\n

                Question 11.
                \nIdentify A,B,C and D
                \n\"Samacheer
                \nAnswer:
                \n\"Samacheer<\/p>\n

                Question 12.
                \nHow will you convert dlethylamine into<\/p>\n

                  \n
                1. N, N – dlethylacetamide<\/li>\n
                2. N – nitrosodiethylamine<\/li>\n<\/ol>\n

                  Answer:
                  \n1. Conversion of diethylamine into N, N – diethylacetamide.
                  \n\"Samacheer
                  \nDiethylamine react with acetyichioride in the presence of pyridine to form N, N – diethyl acetamide.<\/p>\n

                  2. Conversion of diethylamine into N – nitrosodiethylamine.
                  \n\"Samacheer<\/p>\n

                  Question 13.
                  \nIdentify A,B and C
                  \n\"Samacheer
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Question 14.
                  \nIdentify A, B, C and D
                  \n\"Samacheer
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Question 15.
                  \nComplete the following reaction
                  \n\"Samacheer
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Question 16.
                  \nPredict A, B, C and D for the follwing reaction.
                  \n\"Samacheer
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Question 17.
                  \nA dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B) along with liberation of CO2<\/sub>. (B) on heating with liquid ammonia followed by treating with Br2<\/sub> \/ KOH gives (C) which on treating with NaNO2<\/sub> and HCI at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Question 18.
                  \nIdentify A to E in the following frequncy of reactions.
                  \n\"Samacheer
                  \nAnswer:
                  \n\"Samacheer<\/p>\n

                  Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds Evaluate Yourself<\/strong><\/span><\/p>\n

                  Question 1.
                  \nWrite all possible isomers for the following compounds.<\/p>\n

                    \n
                  1. C2<\/sub>H5<\/sub> – NO2<\/sub><\/li>\n
                  2. C3<\/sub>H7<\/sub> – NO2<\/sub><\/li>\n<\/ol>\n

                    Answer:
                    \n1. Possible isomers for C2<\/sub>H5<\/sub>NO2<\/sub> as following<\/p>\n

                    (a) CH3<\/sub> – CH2<\/sub> – NO2<\/sub> – Nitroethane<\/p>\n

                    (b) CH3<\/sub> – CH2<\/sub> – O – N = O – Ethyl nitrite<\/p>\n

                    (c)\"Samacheer<\/p>\n

                    (d) H2<\/sub>N – CH2<\/sub> – COOH – Glycine (amino acid)<\/p>\n

                    (e) \"Samacheer<\/p>\n

                    (f) \"Samacheer<\/p>\n

                    (g) \"Samacheer<\/p>\n

                    2. Possible isomers for C3<\/sub>H7<\/sub>NO2<\/sub> as follows.<\/p>\n

                    (a) CH3<\/sub> – CH2<\/sub> – CH2<\/sub> – NO2<\/sub> – 1 – Nitropropane<\/p>\n

                    (b) CH3<\/sub> – CH2<\/sub> – CH2<\/sub> – O – N = O – propane – 1 – nitrite<\/p>\n

                    (c) \"Samacheer<\/p>\n

                    (d) \"Samacheer<\/p>\n

                    (e) \"Samacheer<\/p>\n

                    (f) H2<\/sub>N – CH2<\/sub> – CH2<\/sub> – COOH – Alanine<\/p>\n

                    Question 2.
                    \nFind out the product of the following reactions
                    \n\"Samacheer
                    \nAnswer:
                    \n\"Samacheer<\/p>\n

                    Question 3.
                    \nPredict the major product that would be obtained on nitration of the following compounds.
                    \n\"Samacheer
                    \nAnswer:
                    \n\"Samacheer<\/p>\n

                    Question 4.
                    \nDraw the structure of the following compounds<\/p>\n

                      \n
                    1. Neopentylamine<\/li>\n
                    2. Tert – butylamine<\/li>\n
                    3. \u03b1 – amino propionaldehyde<\/li>\n
                    4. tribenzylamine<\/li>\n
                    5. N – ethyl – N – methylhexan – 3 – amine<\/li>\n<\/ol>\n

                      Answer:
                      \n1. Neopentylamine:
                      \n\"Samacheer<\/p>\n

                      2. Tert – butylamine
                      \n\"Samacheer<\/p>\n

                      3. \u03b1 – amino propionaldehyde
                      \n\"Samacheer<\/p>\n

                      4. tribenzylamine
                      \n\"Samacheer<\/p>\n

                      5. N – ethyl – N – methylhexan – 3 – amine
                      \n\"Samacheer<\/p>\n

                      Question 5.
                      \nGive the correct IUPAC names for the following amines.
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds Additional Question<\/span><\/h3>\n

                      Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds 1 Mark Questions and Answers<\/strong><\/span><\/p>\n

                      I. Choose the correct answer.<\/span><\/p>\n

                      Quesiton 1.
                      \nWhich one of the following play an important role in bioregulation and neurotransmission?
                      \n(a) Acid derivatives
                      \n(b) Carbonyl compounds
                      \n(c) Organic derivatives of ammonia
                      \n(d) Aromatic hydro carbons
                      \nAnswer:
                      \n(c) Organic derivatives of ammonia<\/p>\n

                      Question 2.
                      \nWhich of the following is needed to maintain the health of nerves, skin and red blood cells?
                      \n(a) Vitamin B12<\/sub>
                      \n(b) Vitamin B6<\/sub>
                      \n(c) Vitamin B1<\/sub>
                      \n(d) Vitamin C
                      \nAnswer:
                      \n(b) Vitamin B6<\/sub><\/p>\n

                      Question 3.
                      \nWhich one of the following is needed to maintain the health of nerves and skin?
                      \n(a) Pyridoxine
                      \n(b) Cobalamine
                      \n(c) Dopamine
                      \n(d) Histamine
                      \nAnswer:
                      \n(a) Pyridoxine<\/p>\n

                      Question 4.
                      \nWhich one of the following is act as neurotransmitter?
                      \n(a) Pyridoxine
                      \n(b) Histamine
                      \n(c) Dopamine
                      \n(d) Cyano cobalamine
                      \nAnswer:
                      \n(c) Dopamine<\/p>\n

                      Question 5.
                      \nWhich one of the following dilates blood vessels?
                      \n(a) Histamine
                      \n(b) Streptomycin
                      \n(c) Penicillin
                      \n(d) Dopamine
                      \nAnswer:
                      \n(a) Histamine<\/p>\n

                      Question 6.
                      \nWhich one of the following is an example of primary nitro alkane?
                      \n(a) 2 – nitropropane
                      \n(b) Ethyl nitrite
                      \n(c) Nitro ethane
                      \n(d) 2 – methyl – 2 – nitropropane
                      \nAnswer:
                      \n(c) Nitro ethane<\/p>\n

                      Question 7.
                      \n2 – methyl – 2 – nitropropane belongs to
                      \n(a) 1\u00b0 nitro alkane
                      \n(b) 3\u00b0 nitro alkane
                      \n(c) 2\u00b0 nitro alkane
                      \n(d) nitro arenes
                      \nAnswer:
                      \n(b) 3\u00b0 nitro alkane<\/p>\n

                      Question 8.
                      \nWhich of the following is an example for 2\u00b0 nitro alkane?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 9.
                      \nWhich one of the following is an example for nitro arenes?
                      \n(a) C6<\/sub>H5<\/sub> – CH2<\/sub> NO6<\/sub>
                      \n(b) C6<\/sub>H5<\/sub>NH2<\/sub>
                      \n(c) CH3<\/sub> – CH2<\/sub> – O – NO
                      \n(d) C6<\/sub>H5<\/sub>NO2<\/sub>
                      \nAnswer:
                      \n(d) C6<\/sub>H5<\/sub>NO2<\/sub><\/p>\n

                      Question 10.
                      \nThe IUPAC name of
                      \n\"Samacheer is ………………
                      \n(a) 1 – nitro butane
                      \n(b) 2 – methyl – 1 – nitro propane
                      \n(c) Isobutyl nitrate
                      \n(d) 1 – Nitro iso butane
                      \nAnswer:
                      \n(b) 2 – methyl – 1 – nitro propane<\/p>\n

                      Question 11.
                      \nWhich one of the following is the structure of 2, 2 – dimethyl – 1 – nitro propane?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 12.
                      \n1 – nitrobutane and 2 – methyl – 1 – mtropropane are belong to ……………..
                      \n(a) position isomerism
                      \n(b) functional isomerism
                      \n(c) Tautomerism
                      \n(d) chain isomerism
                      \nAnswer:
                      \n(d) chain isomerism<\/p>\n

                      Question 13.
                      \nWhich of the following pair shows functional isomerism?
                      \n(a) 1 – nitro butane and 2 – nitro butane
                      \n(b) 1 – nitro butane and butyl nitrite
                      \n(c) 1 – nitro butane and 2 – methyl – 1 – nitropropane
                      \n(d) 2 – nitro butane and 2 – methyl – 2 – nitro propane
                      \nAnswer:
                      \n(b) 1 – nitro butane and butyl nitrite<\/p>\n

                      Question 14.
                      \nWhich of the following pair shows position isomerism?
                      \n(a) 1 – nitro butane and butyl nitrite
                      \n(b) Nitro methane and methyl nitrite
                      \n(c) 1 – nitro butane and 2 – nitro butane
                      \n(d) 1 – nitro butane and 2 – methyl – 1 – nitro propane
                      \nAnswer:
                      \n(c) 1 – nitro butane and 2 – nitro butane<\/p>\n

                      Question 15.
                      \nNitro methane and methyl nitrite are the examples of ……………
                      \n(a) Position isomerism
                      \n(b) chain isomerism
                      \n(c) metarnersm
                      \n(d) Tautomerism
                      \nAnswer:
                      \n(d) Tautomerism<\/p>\n

                      Question 16.
                      \nConsider the following statements.
                      \n(i) Nitro form of alkane dissolves in NaOH instantly
                      \n(ii) Nitro form of alkane decolourises FeCI3<\/sub> solution
                      \n(iii) Nitro form of alkane are more acidic
                      \nWhich of the above statement(s) is \/ are not correct?
                      \n(a) (i) only
                      \n(b) (ii) and (iii)
                      \n(c) (i) and (iii)
                      \n(d) (ii) only
                      \nAnswer:
                      \n(c) (i) and (iii)<\/p>\n

                      Question 17.
                      \nConsider the following statements.
                      \n(i) Aci form of nitro alkanes dissolves in NaOH slowly.
                      \n(ii) Aci form of nitro alkane gives reddish brown colour with FeCl3<\/sub>
                      \n(iii) Aci form of nitro alkane\u2019s electrical conductivity is low.
                      \nWhich of the above statement(s) is \/ are correct?
                      \n(a) (ii) only
                      \n(b) (i) only
                      \n(c) (iii) only
                      \n(d) (i) and (iii)
                      \nAnswer:
                      \n(a) (ii) only<\/p>\n

                      Question 18.
                      \nWhich one of the following does not exhibit tautomerism?
                      \n(a) 1 – nitro ethane
                      \n(b) Nitro methane
                      \n(c) methyl nitrite
                      \n(d) 2 – methyl – 2 – nitro propane
                      \nAnswer:
                      \n(d) 2 – methyl – 2 – nitro propane<\/p>\n

                      Question 19.
                      \nIdentify the compound which does not exhibit tautomerism?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 20.
                      \nThe correct decreasing order of acidity of nitro alkane is …………….
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 21.
                      \nWhich one of the following mechanism is followed by the reaction of Ethyl bromide with ethanolic solution of potassium nitrite ……………
                      \n(a) SN1<\/sup>
                      \n(b) SN2<\/sup>
                      \n(c) SNi<\/sup>
                      \n(d) E1<\/sub>
                      \nAnswer:
                      \n(b) SN2<\/sup><\/p>\n

                      Question 22.
                      \nWhich one of the following is formed when Ethyl bromide reacts with ethanolic solution of potassium nitrite?
                      \n(a) Nitro methane
                      \n(b) 2 – Nitro propane
                      \n(c) 1 – nitro propane
                      \n(d) nitro ethane
                      \nAnswer:
                      \n(d) nitro ethane<\/p>\n

                      Question 23.
                      \nWhich method is used to separate the mixture of nitroalkane?
                      \n(a) Crystallization
                      \n(b) zone refining
                      \n(c) fractional distillation
                      \n(d) sublimation
                      \nAnswer:
                      \n(c) fractional distillation<\/p>\n

                      Question 24.
                      \nWhich of the following is formed when ethane is heated with conc. HNO3<\/sub> at 675 K?
                      \n(a) Nitro propane
                      \n(b) Nitro ethane
                      \n(c) Nitro methane
                      \n(d) both (ii) and (iii)
                      \nAnswer:
                      \n(d) both (ii) and (iii)<\/p>\n

                      Question 25.
                      \nWhat is the product formed when \u03b1 – chioro acetic acid is boiled with aqueous solution of sodium nitrite?
                      \n(a) Nitro ethane
                      \n(b) Nitromethane
                      \n(c) Acetamide
                      \n(d) \u03b1 – chloro acetamide
                      \nAnswer:
                      \n(b) Nitromethane<\/p>\n

                      Question 26.
                      \nWhich one of the following reagent is used to convert teritary butylamine to tertiary nitro alkane?
                      \n(a) Aqueous KMnO4<\/sub>
                      \n(b) Cone HNO3<\/sub>
                      \n(c) Sn \/ HCI
                      \n(d) alcoholic KOH
                      \nAnswer:
                      \n(a) Aqueous KMnO4<\/sub><\/p>\n

                      Question 27.
                      \nThe reagent used in the conversion of acetaldoxime to nitro ethane (1\u00b0) is …………
                      \n(a) aqueous KMnO4<\/sub>
                      \n(b) trifluoro peroxy acetic acid
                      \n(c) alcoholic KOH
                      \n(d) Cone. HNO3<\/sub>
                      \nAnswer:
                      \n(b) trifluoro peroxy acetic acid<\/p>\n

                      Question 28.
                      \nWhich of the following is called oil of mirbane?
                      \n(a) Nitro methane
                      \n(b) Nitro propane
                      \n(c) Nitro benzene
                      \n(d) Nitro ethane
                      \nAnswer:
                      \n(c) Nitro benzene<\/p>\n

                      Question 29.
                      \nOn direct nitration of nitro benzene gives ………………
                      \n(a) 0 – dinitro benzene
                      \n(b) m – dinitro benzene
                      \n(c) p – dinitro benzene
                      \n(d) 2, 4, 6 – trinitrobenzene
                      \nAnswer:
                      \n(b) m – dinitro benzene<\/p>\n

                      Question 30.
                      \nAmino group can be directly converted into nitro group by ……………
                      \n(a) Caro\u2019s acid
                      \n(b) Fuming mixture of conc. HNO3<\/sub> + conc. H2<\/sub>SO4<\/sub>
                      \n(c) NaNO2<\/sub> + HCI
                      \n(d) Ethanolic KNO2<\/sub>
                      \nAnswer:
                      \n(a) Caro\u2019s acid<\/p>\n

                      Question 31.
                      \nAmino group can be directly converted into nitro group by ………….
                      \n(a) Caro\u2019s acid
                      \n(b) marshall\u2019s acid
                      \n(c) Peroxy trifluoro acetic acid
                      \n(d) all the above
                      \nAnswer:
                      \n(d) all the above<\/p>\n

                      Question 32.
                      \nConsider the following statements.
                      \n(i) Nitro alkanes have high points because of their highly polar nature
                      \n(ii) Alkyl nitrites have lower boiling points than nitro alkanes.
                      \n(iii) Nitro alkanes are readily soluble in water due to intermolecular hydrogen bonding formation.
                      \nWhich of the above statement(s) is \/ are not correct?
                      \n(a) (i) only
                      \n(b) (ii) only
                      \n(c) (iii) only
                      \n(d) (i) and (ii)
                      \nAnswer:
                      \n(c) (iii) only<\/p>\n

                      Question 33.
                      \nThe reagent used to convert Nitromethane to methyl amine is ……..
                      \n(a) Zn\/NH4<\/sub>Cl
                      \n(b) Sn\/HCI
                      \n(c) H2<\/sub>SO5<\/sub>
                      \n(d) H2<\/sub>S2<\/sub>O8<\/sub>
                      \nAnswer:
                      \n(b) Sn\/HCI<\/p>\n

                      Question 34.
                      \nThe reagent used to convert Nitromethane to N – methyl hydroxylamine is …………
                      \n(a) Sn\/HCl
                      \n(b) Zn\/NH4<\/sub>CI
                      \n(c) Ni
                      \n(d) Pd\/BaSO4<\/sub>
                      \nAnswer:
                      \n(b) Zn\/NH4<\/sub>CI<\/p>\n

                      Question 35.
                      \nWhich one of the following is formed when ethyl nitrite is treated with Sn\/HCl?
                      \n(a) Nitro ethane
                      \n(b) Ethylamine
                      \n(c) Ethyl alcohol
                      \n(d) Ethanamide
                      \nAnswer:
                      \n(c) Ethyl alcohol<\/p>\n

                      Question 36.
                      \nThe product formed when nitro ehtane is boiled with conc. HCl is ……………
                      \n(a) Acetic acid
                      \n(b) Ethyl chloride
                      \n(c) Ethanoyl chloride
                      \n(d) Amino ehtane
                      \nAnswer:
                      \n(a) Acetic acid<\/p>\n

                      Question 37.
                      \nWhich one of the following is formed when 2- nitro propane is boiled with conc.HCI?
                      \n(a) Ethanoic acid
                      \n(b) Propanoic acid
                      \n(c) Propanoyl chloride
                      \n(d) Acetone
                      \nAnswer:
                      \n(d) Acetone<\/p>\n

                      Question 38.
                      \nWhich of the following does not react with conc. HCI?
                      \n(a) Nitro ethane
                      \n(b) 2 – methyl – 2 – nitropropane
                      \n(c) 2 – nitro propane
                      \n(d) Aniline
                      \nAnswer:
                      \n(b) 2 – methyl – 2 – nitropropane<\/p>\n

                      Question 39.
                      \nAcid (or) Basic hydrolysis of ethyl nitrite gives ………….
                      \n(a) Ethanoic acid
                      \n(b) Nitro ethane
                      \n(c) Ethanol
                      \n(d) Aceto nitrile
                      \nAnswer:
                      \n(c) Ethanol<\/p>\n

                      Question 40.
                      \nWhich one of the following is formed when nitro methane reacts with chlorine and NaOH?
                      \n(a) CH3<\/sub>CI
                      \n(b) CH3<\/sub>COCl
                      \n(c) CCI3<\/sub>NO2<\/sub>
                      \n(d) CHCI2<\/sub>NO2<\/sub>
                      \nAnswer:
                      \n(c) CCI3<\/sub>NO2<\/sub><\/p>\n

                      Question 41.
                      \nWhich one of the following reagent is used to convert Nitrobenzene to aniline?
                      \n(a) Sn\/HCI
                      \n(b) Zn\/NH4<\/sub>CI
                      \n(c) Fe\/H2<\/sub>O(g)<\/sub>
                      \n(d) Zn\/NaOH
                      \nAnswer:
                      \n(a) Sn\/HCI<\/p>\n

                      Question 42.
                      \nWhich one of the following is the best reagent used to convert Nitrobenzene into Nitroso benzene?
                      \n(a) Sn\/HCI
                      \n(b) Zn\/NH4<\/sub>CI
                      \n(c) Fe\/H2<\/sub>O(g)<\/sub>
                      \n(d) SnCl2<\/sub> + KOH
                      \nAnswer:
                      \n(c) Fe\/H2<\/sub>O(g)<\/sub><\/p>\n

                      Question 43.
                      \nIdentify the reagent used to convert Nitrobenzene into hydrazo benzene?
                      \n(a) Zn\/NaOH
                      \n(b) Zn\/NH4<\/sub>CI
                      \n(c) Sn\/HCI
                      \n(d) SnCI2<\/sub> + KOH
                      \nAnswer:
                      \n(a) Zn\/NaOH<\/p>\n

                      Question 44.
                      \nWhich one of the following is formed when nitrobenzene is treated with Fe\/H2<\/sub>O(Steam)<\/sub>?
                      \n(a) Aniline
                      \n(b) Phenyl hydroxylamine
                      \n(c) Nitroso benzene
                      \n(d) Azobenzene
                      \nAnswer:
                      \n(c) Nitroso benzene<\/p>\n

                      Question 45.
                      \nWhich one of the following is formed when nitrobenzene is treated with Zn\/NaOH?
                      \n(a) Phenyl amine
                      \n(b) Phenyl hydroxylamine
                      \n(c) Azo benzene
                      \n(d) Hydrazo benzene
                      \nAnswer:
                      \n(d) Hydrazo benzene<\/p>\n

                      Question 46.
                      \nWhich one of the following is formed when nitrobenzene is treated with SnCI2<\/sub>\/KOH?
                      \n(a) Azo benzene
                      \n(b) Azoxy benzene
                      \n(c) Hydrazo benzene
                      \n(d) Nitroso benzene
                      \nAnswer:
                      \n(a) Azo benzene<\/p>\n

                      Question 47.
                      \nWhich of the following is formed when nitro benzene undergoes electrolytic reduction?
                      \n(a) Aniline
                      \n(b) Phenyl hydroxylamine
                      \n(c) p – amino phenol
                      \n(d) all the above
                      \nAnswer:
                      \n(d) all the above<\/p>\n

                      Question 48.
                      \nWhich of the following can be used to reduce nitrobenzene to aniline?
                      \n(a) LiAIH4<\/sub>
                      \n(b) Sn + HCI
                      \n(c) Pt\/H2<\/sub>
                      \n(d) all the above
                      \nAnswer:
                      \n(d) all the above<\/p>\n

                      Question 49.
                      \nWhat will be the product formed when nitrobenzene is treated with conc. HNO3<\/sub> and conc.H2<\/sub>SO4<\/sub> at 373K?
                      \n(a) 1, 3 – dinitro benzene
                      \n(b) 1, 4 – dinitro benzene
                      \n(c) 1, 3, 5 – trinitro benzene
                      \n(d) all the above
                      \nAnswer:
                      \n(a) 1, 3 – dinitro benzene<\/p>\n

                      Question 50.
                      \nWhich one of the following is formed when nitrobenzene is treated with cone. HNO3<\/sub> and H2<\/sub>SO4<\/sub> 473 K?
                      \n(a) 1, 2 – din itro benzene
                      \n(b) 1, 4 – dintro benzene
                      \n(c) 1, 3 – dinitro benzene
                      \n(d) 1, 3, 5 – trinitro benzene
                      \nAnswer:
                      \n(d) 1, 3, 5 – trinitro benzene<\/p>\n

                      Question 51.
                      \nWhat will be the product formed when 1, 3, 5 – trinito toluene is treated with acidified Na2<\/sub>Cr2<\/sub>O7<\/sub> and sodalime?
                      \n(a) TNB
                      \n(b) TNT
                      \n(c) TNG
                      \n(d) GTN
                      \nAnswer:
                      \n(a) TNB<\/p>\n

                      Question 52.
                      \nWhat is the IUPAC name of
                      \n\"Samacheer
                      \n(a) Tertiary butyl amine
                      \n(b) Trimethyl amine
                      \n(c) N, N – dimethyl methanamine
                      \n(d) N – methyl ethanamine
                      \nAnswer:
                      \n(c) N, N – dimethyl methanamine<\/p>\n

                      Question 53.
                      \nWhich one of the following is called (N – ethyl – N – methyl) propanamine?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 54.
                      \nThe IUPAC name of
                      \n\"Samacheer is ……………..
                      \n(a) Methyl iso propyl amine
                      \n(b) N – methyl propan – 1 – amine
                      \n(c) N, N – dimethyl methanamine
                      \n(d) propan – 1 – amine
                      \nAnswer:
                      \n(b) N – methyl propan – 1 – amine<\/p>\n

                      Question 55.
                      \nWhat is the IUPAC name of
                      \n\"Samacheer
                      \n(a) Ethyl methyl isopropylamine
                      \n(b) N, N – dimethyl methanamine
                      \n(c) N, N – diethyl butan – 1 – amine
                      \n(d) N – ethyl – N – methyl propan -2 – amine
                      \nAnswer:
                      \n(d) N – ethyl – N – methyl propan -2 – amine<\/p>\n

                      Question 56.
                      \nWhich one of the following is called Hexane – 1, 6 – diamine?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 57.
                      \nWhich one of the following is the TUPAC name of CH2<\/sub> = CH – CH2<\/sub> – NH2<\/sub>?
                      \n(a) Isopropyl amine
                      \n(b) Allylamine
                      \n(c) 1 – amino propane
                      \n(d) prop – 2 – en – 1 – amine
                      \nAnswer:
                      \n(d) prop – 2 – en – 1 – amine<\/p>\n

                      Question 58.
                      \nWhich one of the following is the structure of phenyl methanamine?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 59.
                      \nConsider the following statements.
                      \n(i) Nitrogen atom of amines is trivalent and carries a lone pair of electron.
                      \n(ii) Nitrogen atom of amines is Sp2 hybridised.
                      \n(iii) Amines posses pyramidal geometry.
                      \nWhich of the above statement(s) is \/ are correct?
                      \n(a) (i) and (ii)
                      \n(b) (i) and (iii)
                      \n(c) (iii) only
                      \n(d) (ii) only
                      \nAnswer:
                      \n(b) (i) and (iii)<\/p>\n

                      Question 60.
                      \nWhat is the C – N – C bond angle of trimethylamine?
                      \n(a) 109\u00b0. 5′
                      \n(b) 107\u00b0
                      \n(c) 108\u00b0
                      \n(d) 108\u00b0. 31\u2019
                      \nAnswer:
                      \n(c) 108\u00b0<\/p>\n

                      Question 61.
                      \nWhich one of the following is the geometry of amines?
                      \n(a) Tetrahedral
                      \n(b) Pyramidal
                      \n(c) Planar triangle
                      \n(d) square planar
                      \nAnswer:
                      \n(b) Pyramidal<\/p>\n

                      Question 62.
                      \nWhich one of the following is formed when cyano methane reacts with LiAIH4<\/sub>?
                      \n(a) Ethanamine
                      \n(b) Methane
                      \n(c) Methanoic acid
                      \n(d) Acetic acid
                      \nAnswer:
                      \n(a) Ethanamine<\/p>\n

                      Question 63.
                      \nThe reducing agent used in mendius reaction is …………
                      \n(a) H2<\/sub>\/Ni
                      \n(b) LiAIH4<\/sub>
                      \n(c) Na\/C2<\/sub>H5<\/sub>OH
                      \n(d) Sn\/HCI
                      \nAnswer:
                      \n(c) Na\/C2<\/sub>H5<\/sub>OH<\/p>\n

                      Question 64.
                      \nThe product formed when methyl isocyanide is reduced by Na(Hg)\/C2<\/sub>H5<\/sub>OH is …………
                      \n(a) Isopropyl amine
                      \n(b) Ethanamine
                      \n(c) N – methyl methanamine
                      \n(d) N – ethyl methanamine
                      \nAnswer:
                      \n(c) N – methyl methanamine<\/p>\n

                      Question 65.
                      \nWhich one of the following is formed when acetamide reacts with LiAlH4<\/sub> and H2<\/sub>O?
                      \n(a) Methyl amine
                      \n(b) Ethylamine
                      \n(c) Ammonium acetate
                      \n(d) N – methyl ethanamine
                      \nAnswer:
                      \n(b) Ethylamine<\/p>\n

                      Question 66.
                      \nIn which reaction acetamide is changed to methylamine by the action of Br2<\/sub>\/KOH?
                      \n(a) Gapriel phthalimide synthesis
                      \n(b) Hoffmann degration reaction
                      \n(c) Mendius reaction
                      \n(d) Mustard oil reaction
                      \nAnswer:
                      \n(b) Hoffmann degration reaction<\/p>\n

                      Question 67.
                      \nWhich one of the reaction is used in the synthesis of aliphatic primary amines?
                      \n(a) Hoffmann ammonolysis
                      \n(b) Rosenmund’s reduction
                      \n(c) Carbylamine reaction
                      \n(d) Gabriel phthalimide synthesis
                      \nAnswer:
                      \n(d) Gabriel phthalimide synthesis<\/p>\n

                      Question 68.
                      \nThe conversion of ethanol into all types of amines by the action of ammonia along with Alumina is …………
                      \n(a) HVZ reaction
                      \n(b) Sabatier – mailhe method
                      \n(c) Carbylamine reaction
                      \n(d) Mendius reaction
                      \nAnswer:
                      \n(b) Sabatier – mailhe method<\/p>\n

                      Question 69.
                      \nConsider the following statements.
                      \n(i) Amines have higher boiling point than alcohols.
                      \n(ii) Lower aliphatic amines are colourless gases whereas higher amines have fish like small.
                      \n(iii) Aniline and arylamines are colourless but when exposed to air they become coloured due to oxidation.
                      \nWhich of the above statement(s) is \/ are correct?
                      \n(a) (i) and (ii)
                      \n(b) (ii) and (iii)
                      \n(c) (i) only
                      \n(d) (iii) only
                      \nAnswer:
                      \n(b) (ii) and (iii)<\/p>\n

                      Question 70.
                      \nThe correct order of basic strength in the case of ailcyl substituted amines is …………
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 71.
                      \nThe correct order of basic strength in the case of substituted ethyl amines is ………….
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 72.
                      \nThe relative basicity of amine follows the order as ………….
                      \n(a) Alkyl amines > Aralkyl amines > Ammonia > N – aralkylamine > Arylamine
                      \n(b) Aralkyl amines > Ammonia > Arylamine > Alkyl amine > N – aralkylamine
                      \n(c) Arylamine Alkyl amine N – aralkylanilne
                      \n(d) N – aralkylamine < Arylamine < Ammonia < Alkyl amine < Aralkyl amine Answer: (a) Alkyl amines > Aralkyl amines > Ammonia > N – aralkylamine > Arylamine
                      \nAnswer:
                      \n(a) Alkyl amines > Aralkyl amines > Ammonia > N – aralkylamine > Arylamine<\/p>\n

                      Question 73.
                      \nIdentify the name of the reaction in which aniline reacts with Benzoyl chloride to form N – Phenyl benzamide?
                      \n(a) Hoffmann degradation reaction
                      \n(b) Gabriel phthalimide synthesis
                      \n(c) Schotten – Baumann reaction
                      \n(d) Mustard oil reaction
                      \nAnswer:
                      \n(c) Schotten – Baumann reaction<\/p>\n

                      Question 74.
                      \nWhich one of the product is formed when aniline reacts with benzoyl chloride in the presence of NaOH?
                      \n(a) N – Phenyl benzamide
                      \n(b) N – Phenyl ethanamide
                      \n(c) Benzamide
                      \n(d) N – Benzyl aniline
                      \nAnswer:
                      \n(b) N – Phenyl ethanamide<\/p>\n

                      Question 75.
                      \nWhich one of the following is formed as product when ethylamine reacts with nitrous acid?
                      \n(a) Ethyl nitrite
                      \n(b) Nitro ethane
                      \n(c) Ethanol
                      \n(d) Ethane nitrile
                      \nAnswer:
                      \n(c) Ethanol<\/p>\n

                      Question 76.
                      \nIdentify X in the following reaction?
                      \n\"Samacheer
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 77.
                      \nThe reaction of aniline with nitrous acid at low temperature is known as …………
                      \n(a) Carbylamme reaction
                      \n(b) mustard oil reaction
                      \n(c) Diazotisation
                      \n(d) Sand meyer\u2019s reaction
                      \nAnswer:
                      \n(c) Diazotisation<\/p>\n

                      Question 78.
                      \nWhich one of the product is formed with N-methyl aniline reacts with nitrous acid?
                      \n(a) Anilinium chloride
                      \n(b) N – nitroso methyl phenylamine
                      \n(c) Benzene diazonium chloride
                      \n(d) Benzylamine
                      \nAnswer:
                      \n(b) N – nitroso methyl phenylamine<\/p>\n

                      Question 79.
                      \nWhich one of the r\u00e9action is called Libermann\u2019s nitroso set?
                      \n(a) N – methyl aniline Conc. \"Samacheer\u00a0N – nitroso methyl phenylamine.
                      \n(b) \"Samacheer\u00a0Benzene diazonium chloride.
                      \n(c) Aniline + CHCI3<\/sub> + 3KOH \u2192 Phenyl iso cyanide.
                      \n(d) Methyl amine + CHCl3<\/sub> + 3KOH \u2192 Methyl iso cyanide.
                      \nAnswer:
                      \n(a) N – methyl aniline Conc. \"Samacheer\u00a0N – nitroso methyl phenylamine.<\/p>\n

                      Question 80.
                      \nThe conversion of N – methyl aniline into N – nitrosomethyl phenyl amine is known as …………
                      \n(a) Carbylamine reaction
                      \n(b) mustard oil reaction
                      \n(c) Diazotisation
                      \n(d) Libermann\u2019s nitroso test
                      \nAnswer:
                      \n(d) Libermann\u2019s nitroso test<\/p>\n

                      Question 81.
                      \nWhich one of the following reaction is used to identify primary amines?
                      \n(a) Schotten – Baumann reaction
                      \n(b) Carbylamine reaction
                      \n(c) Sand meyer\u2019s reaction
                      \n(d) Gattermann reaction
                      \nAnswer:
                      \n(b) Carbylamine reaction<\/p>\n

                      Question 82.
                      \nThe reaction between methylamine and CS2<\/sub> is known as ……………
                      \n(a) mustard oil reaction
                      \n(b) Carbylamine reaction
                      \n(c) Sand meyer\u2019s reaction
                      \n(d) Gabriel phthalirnide synthesis
                      \nAnswer:
                      \n(a) mustard oil reaction<\/p>\n

                      Question 83.
                      \nWhich one of the following is formed when aniline reacts with CS2<\/sub> followed by hydrolysis by cone. HCI?
                      \n(a) Phenyl isocyanide
                      \n(b) phenyl cyanide
                      \n(c) Phenvi isothio cyanate
                      \n(d) Benzene diazonium chloride
                      \nAnswer:
                      \n(c) Phenvi isothio cyanate<\/p>\n

                      Question 84.
                      \nConsider the following reaction.
                      \n(i) Aniline does not undergo friedel – crafts reaction
                      \n(ii) Aromatic amine on treatment with NaNO2<\/sub> + HCI gives diazonium slats.
                      \n(iii) Aniline is more basic than ammonia.
                      \nWhich of the above statement(s) is \/ are not correct?
                      \n(a) (i) only
                      \n(b) (i) and (ii)
                      \n(c) (iii) only
                      \n(d) (ii) only
                      \nAnswer:
                      \n(c) (iii) only<\/p>\n

                      Question 85.
                      \nWhich one of the following is formed when aniline reacts with cone. H2<\/sub>SO4<\/sub>?
                      \n(a) Zwitter ion
                      \n(b) Acetanilide
                      \n(c) Suiphanilic acid
                      \n(d) p – sulphonic bcnzoic acid
                      \nAnswer:
                      \n(c) Suiphanilic acid<\/p>\n

                      Question 86.
                      \nConsider the following statements.
                      \n(i) Benzene diazonium chloride aqueous solution are neutral to litmus.
                      \n(ii) The stability of arene diazonium salt is due to the dispersal of the positive charge over the ring.
                      \n(iii) Benzenediazonium chloride is reddish brown colour liquid.
                      \nWhich of the above statement(s) is \/ are correct?
                      \n(a) (iii) and (ii)
                      \n(b) (i) and (ii)
                      \n(c) (i) and (iii)
                      \n(d) (iii) only
                      \nAnswer:
                      \n(b) (i) and (ii)<\/p>\n

                      Question 87.
                      \nIdentify the product formed when Benzene diazonium chloride reacts with phosphinic acid?
                      \n(a) Benzene
                      \n(b) Chioro benzene
                      \n(c) Phenol
                      \n(d) cyano benzene
                      \nAnswer:
                      \n(a) Benzene<\/p>\n

                      Question 88.
                      \nThe conversion of Benzene diazonium chloride into chlorobenzene is known as …………
                      \n(a) Gabriel phthalimide synthesis
                      \n(b) Carbylamine reaction
                      \n(c) Sand meyer reaction
                      \n(d) Coupling reaction
                      \nAnswer:
                      \n(c) Sand meyer reaction<\/p>\n

                      Question 89.
                      \nIdentify X and Y in the following reaction
                      \n\"Samacheer
                      \n(a) C6<\/sub>H5<\/sub>CI + N2<\/sub>
                      \n(b) C6<\/sub>H6<\/sub> + N2<\/sub>
                      \n(c) C6<\/sub>H5<\/sub>CI + NH4<\/sub>CI
                      \n(d) C6<\/sub>H5<\/sub>CI + H2<\/sub>
                      \nAnswer:
                      \n(a) C6<\/sub>H5<\/sub>CI + N2<\/sub><\/p>\n

                      Question 90.
                      \nWhich one of the following is formed when benzene diazonium chloride is boiled with water?
                      \n(a) Benzene
                      \n(b) Phenol
                      \n(c) Chiorobenzene
                      \n(d) Aniline
                      \nAnswer:
                      \n(b) Phenol<\/p>\n

                      Question 91.
                      \nComplete the following reaction.
                      \n\"Samacheer
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 92.
                      \nWhat is the name of the reaction in which benzene diazonium chloride react with benzene to give Biphenyl?
                      \n(a) Sandmeyer\u2019s reaction
                      \n(b) Gomberg reaction
                      \n(c) Gattermann reaction
                      \n(d) Baltz – schiemann reaction
                      \nAnswer:
                      \n(b) Gomberg reaction<\/p>\n

                      Question 93.
                      \nWhich one of the following reagent reacts with ben.zene diazonium chloride to give biphenyl?
                      \n(a) Chioro benzene
                      \n(b) Bromobenzene
                      \n(c) Benzene
                      \n(d) Acetic acid
                      \nAnswer:
                      \n(c) Benzene<\/p>\n

                      Question 94.
                      \nWhich one of the following is formed when Benzene dia.zonium chloride reacts with Aniline?
                      \n(a) p – hydroxy azo benzene
                      \n(b) 2 – phenyl azo – 4 – methyl
                      \n(c) Biphenyl
                      \n(d) p – amino azo benzene
                      \nAnswer:
                      \n(d) p – amino azo benzene<\/p>\n

                      Question 95.
                      \nWhich one of the following should react with Benzene diazonium chloride to get orange dye?
                      \n(a) Aniline
                      \n(b) phenol
                      \n(c) 0 – cresol
                      \n(d) P – cresol
                      \nAnswer:
                      \n(b) phenol<\/p>\n

                      Question 96.
                      \nAniline + Benzene diazonium chloride \u2192 X. Identify X.
                      \n(a) orange dye
                      \n(b) yellow dye
                      \n(c) malachite green dye
                      \n(d) madder dye
                      \nAnswer:
                      \n(b) yellow dye<\/p>\n

                      Question 97.
                      \nWhich one of the following is the IUPAC name of CH3<\/sub> – CH2<\/sub> – CH2<\/sub>CN?
                      \n(a) Propiono nitrite
                      \n(b) Butane cyanide
                      \n(c) Isobutyro nitnie
                      \n(d) Butane nitrile
                      \nAnswer:
                      \n(d) Butane nitrile<\/p>\n

                      Question 98.
                      \nWhich one of the following is formed when methyl magnesium bromide reacts with cyanogen chloride?
                      \n(a) methane nitrile
                      \n(b) ethane nitrite
                      \n(c) Acetamide
                      \n(d) Nitro ethane
                      \nAnswer:
                      \n(b) ethane nitrite<\/p>\n

                      Question 99.
                      \nThe reagent used in the conversion of CH3<\/sub>CONH2<\/sub> into CH3<\/sub>CN is …………
                      \n(a) Br2<\/sub>\/KOH
                      \n(b) conc. HNO3<\/sub>
                      \n(c) Sn\/HCI
                      \n(d) P2<\/sub>O5<\/sub>
                      \nAnswer:
                      \n(d) P2<\/sub>O5<\/sub><\/p>\n

                      Question 100.
                      \nThe product of complete hydrolysis of Ethane nitrite is …………
                      \n(a) Ethane
                      \n(b) Ethyl nitrate
                      \n(c) Nitro ethane
                      \n(d) Acetic acid
                      \nAnswer:
                      \n(d) Acetic acid<\/p>\n

                      Question 101.
                      \nWhat is the name of the reaction that take place between Ethane nitrile and Ethyl propionate?
                      \n(a) Coupling reaction
                      \n(b) Levine and hauser acetylation
                      \n(c) Diazotisation
                      \n(d) Acetic acid
                      \nAnswer:
                      \n(b) Levine and hauser acetylation<\/p>\n

                      Question 102.
                      \nWhich one of the following is formed when methyl iso cyanide \u00f9ndergoes acid hydrolysis?
                      \n(a) Dimethyl amine + H2<\/sub>O
                      \n(b) Acetic acid + Formic acid
                      \n(c) Methyl amine + Formic acid
                      \n(d) Methyl cyanide + Ammonia
                      \nAnswer:
                      \n(c) Methyl amine + Formic acid<\/p>\n

                      Question 103.
                      \nThe product formed when methyl isocyanide is heated to 250\u00b0C is …………
                      \n(a) Methyl amine
                      \n(b) Methyl cyanide
                      \n(c) Ethyl Cyanide
                      \n(d) Amino ethane
                      \nAnswer:
                      \n(b) Methyl cyanide<\/p>\n

                      Question 104.
                      \nWhich one of the following is used a fuel for cars?
                      \n(a) CH3<\/sub>NO2<\/sub>
                      \n(b) CH3<\/sub>NH2<\/sub>
                      \n(c) CH3<\/sub>N
                      \n(d) CH3<\/sub>NC
                      \nAnswer:
                      \n(a) CH3<\/sub>NO2<\/sub><\/p>\n

                      Question 105.
                      \nChloropicrin is used as ……….
                      \n(a) antiseptic
                      \n(b) analgesic
                      \n(c) insecticide
                      \n(d) fertilizer
                      \nAnswer:
                      \n(c) insecticide<\/p>\n

                      Question 106.
                      \nWhich one of the following is used as a fuel additive and precursor to explosive?
                      \n(a) Nitroglycerine
                      \n(b) Nitro methane
                      \n(c) Nitro benzene
                      \n(d) Nitro ethane
                      \nAnswer:
                      \n(d) Nitro ethane<\/p>\n

                      Question 107.
                      \nWhich one of the following is known as sweet spirit of nitre?
                      \n(a) 10 % solution of methyl nitrite
                      \n(b) 4% solution of ethyl nitrite
                      \n(c) 10% solution of ethyl nitrite
                      \n(d) 40% solution of methanal
                      \nAnswer:
                      \n(b) 4% solution of ethyl nitrite<\/p>\n

                      Question 108.
                      \nWhich one of the following is used as diuretic?
                      \n(a) Nitro methane
                      \n(b) Nitrobenzene
                      \n(c) ethyl nitrite
                      \n(d) Oil of mirbane
                      \nAnswer:
                      \n(c) ethyl nitrite<\/p>\n

                      Question 109.
                      \nWhich of the following is used to produce lubircating oils in motors and machinery?
                      \n(a) Nitro benzene
                      \n(b) m – dinitro benzene
                      \n(c) 1, 3, 5 – trinitro benzene
                      \n(d) Nitro glycerine
                      \nAnswer:
                      \n(a) Nitro benzene<\/p>\n

                      Question 110.
                      \nWhich of the following is used in the manufacture of aniline, synthetic rubber, dyes and explosives like TNT, TNB?
                      \n(a) Nitro ethane
                      \n(b) Aminobenzene
                      \n(c) Nitro benzene
                      \n(d) Benzene diazonium chloride
                      \nAnswer:
                      \n(c) Nitro benzene<\/p>\n

                      Question 111.
                      \nWhich of the following is used in textile industries and also as a solvent in perfume industries?
                      \n(a) Alkyl cyanide
                      \n(b) Alkyl iso cyanide
                      \n(c) Alkyl iso thio cyanate
                      \n(d) Alkyl amine
                      \nAnswer:
                      \n(a) Alkyl cyanide<\/p>\n

                      Question 112.
                      \nWhich one of the following is used as an anticancer agent used to stomach and colon cancer?
                      \n(a) Vitamin C
                      \n(b) Cobalamine
                      \n(c) mitomycin C
                      \n(d) Streptomycin
                      \nAnswer:
                      \n(c) mitomycin C<\/p>\n

                      Question 113.
                      \nIn the Hoffmann bromamide degradation reaction, the number of moles of KOH and Br2<\/sub> used per mole of amine produced are …………..
                      \n(a) four moles of KOH and two moles of Br2<\/sub>
                      \n(b) two moles of KOH and two moles of Br2<\/sub>
                      \n(c) four moles of KOH and one moles of Br2<\/sub>
                      \n(d) one moles of KOH and one moles of Br2<\/sub>
                      \nAnswer:
                      \n(c) four moles of KOH and one moles of Br2<\/sub><\/p>\n

                      Question 114.
                      \nWhat is the product obtained in the following reaction?
                      \n\"\"
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 115.
                      \nThe reagent with which the following reaction is best accomplished is ………….
                      \n\"Samacheer
                      \n(a) H3<\/sub>PO3<\/sub>
                      \n(b) H3<\/sub>PO4<\/sub>
                      \n(c) H3<\/sub>PO2<\/sub>
                      \n(d) NaHSO3<\/sub>
                      \nAnswer:
                      \n(c) H3<\/sub>PO2<\/sub><\/p>\n

                      Question 116.
                      \nThe amine \u201cA\u201d when treated with nitrous acid gives yellow oily substance. The amine \u201cA\u201d is …………
                      \n(a) Triethylamine
                      \n(b) Trimethylamine
                      \n(c) aniline
                      \n(d) Ethyl methyl amine
                      \nAnswer:
                      \n(d) Ethyl methyl amine<\/p>\n

                      Question 117.
                      \nWhich one of the following amide will not undergo Hoffmann bromamide reaction?
                      \n(a) CH3<\/sub>CONH2<\/sub>
                      \n(b) CH3<\/sub>CONHCH3<\/sub>
                      \n(c) C6<\/sub>H5<\/sub>CONH2<\/sub>
                      \n(d) CH3<\/sub>CH2<\/sub>CONH2<\/sub>
                      \nAnswer:
                      \n(b) CH3<\/sub>CONHCH3<\/sub><\/p>\n

                      Question 118.
                      \nReplacement of diazonium group by fluorine is known as …………..
                      \n(a) Gattennann reaction
                      \n(b) Sandmeyer reaction
                      \n(c) Baltz – Schiemann reaction
                      \n(d) Comberg reaction
                      \nAnswer:
                      \n(c) Baltz – Schiemann reaction<\/p>\n

                      Question 119.
                      \nConsidering the basic strength of amines in aqueous solution, which are has the smallest pK value?
                      \n(a) CH3<\/sub>NH2<\/sub>
                      \n(b) (CH3<\/sub>)3<\/sub>N
                      \n(c) C6<\/sub>H5<\/sub>NH2<\/sub>
                      \n(d) (CH3<\/sub>)3<\/sub>NH
                      \nAnswer:
                      \n(d) (CH3<\/sub>)3<\/sub>NH<\/p>\n

                      Question 120.
                      \nWhich one of the following is the strongest base in aqueous solution?
                      \n(a) Trimethyl amine
                      \n(c) Dimethyl amine
                      \n(d) methyl amine
                      \n(b) Aniline
                      \nAnswer:
                      \n(c) Dimethyl amine<\/p>\n

                      Question 121.
                      \nDiethyl amine when treated with nitrous acid yields
                      \n(a) Diethyl ammonium nitrite
                      \n(b) Ethyl alcohol
                      \n(c) N – nitroso diethyl amine
                      \n(d) Triethyl ammonium nitrate
                      \nAnswer:
                      \n(c) N – nitroso diethyl amine<\/p>\n

                      Question 122.
                      \nWhich one of the following on reduction with Lithium aluminium hydride yields a secondary amine?
                      \n(a) Methyl iso cyanide
                      \n(b) Acetamide
                      \n(c) Methyl cyanide
                      \n(d) Nitro ethane
                      \nAnswer:
                      \n(a) Methyl iso cyanide<\/p>\n

                      Question 123.
                      \nThe action of nitrous acid on ethylamine gives
                      \n(a) Ethane
                      \n(b) ammonia
                      \n(c) Ethyl alcohol
                      \n(d) Ethyl nitrite
                      \nAnswer:
                      \n(c) Ethyl alcohol<\/p>\n

                      Question 124.
                      \nIndicate which nitrogen compound amongst the following would undergo Hoffmann reaction with Br2<\/sub> and strong KOH to furnish primary amine kNH2<\/sub>.
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 125.
                      \nThe correct order of basicity of the following compounds is …………..
                      \n\"Samacheer
                      \n(a) (ii) > (i) > (iii) > (iv)
                      \n(b) (i) > (iii) > (ii) > (iv)
                      \n(c) (iii) > (i) > (ii) > (iv)
                      \n(d) (i) > (ii) > (iii) > (iv)
                      \nAnswer:
                      \n(b) (i) > (iii) > (ii) > (iv)<\/p>\n

                      Question 126.
                      \nWhich of the following would be most reactive towards nitration?
                      \n(a) Benzene
                      \n(b) nitrobenzene
                      \n(c) Toluene
                      \n(d) Chiorobenzene
                      \nAnswer:
                      \n(b) nitrobenzene<\/p>\n

                      Question 127.
                      \nAniline reacts with acetaldehyde to form.
                      \n(a) Schiff\u2019s base
                      \n(b) carbylamine
                      \n(c) Imine
                      \n(d) acetaldoxime
                      \nAnswer:
                      \n(a) Schiff\u2019s base<\/p>\n

                      Question 128.
                      \nWhich of the following is the strongest base?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 129.
                      \nA primary amine is formed from an amide by the treatment of bromine and alkali. The primary amine has ……………
                      \n(a) 1 Carbon atom less than amide
                      \n(b) 1 carbon atom more than amide
                      \n(c) 1 hydrogen atom less than amide
                      \n(d) 1 Hydrogen atom more than amide
                      \nAnswer:
                      \n(a) 1 Carbon atom less than amide<\/p>\n

                      Question 130.
                      \nLiebermann\u2019s nitroso reaction is used for testing ………….
                      \n(a) 1\u00b0 amine
                      \n(b) 2\u00b0 amine
                      \n(c) 3\u00b0 amine
                      \n(d) all the above
                      \nAnswer:
                      \n(b) 2\u00b0 amine<\/p>\n

                      Question 131.
                      \nA nauseating smell in the carbylamine test for primary amines is due to the formation of …………
                      \n(a) iso cyanide
                      \n(b) chloroform
                      \n(c) cyanide
                      \n(d) iso thiocyanate
                      \nAnswer:
                      \n(a) iso cyanide<\/p>\n

                      Question 132.
                      \nA positive carbylamine test is given by …………
                      \n(a) N, N – dimethyl aniline
                      \n(b) 2, 4 – dimethyl aniline
                      \n(c) N – methyl – 0 – methyl aniline
                      \n(d) p – methyl benzylamine
                      \nAnswer:
                      \n(b) 2, 4 – dimethyl aniline<\/p>\n

                      Question 133.
                      \nWhen primary amine is heated with CS2<\/sub> in the presence of excess of mercuric chloride, it gives isothiocyanate. This reaction is called ……………..
                      \n(a) Hoffmann bromamide reaction
                      \n(b) Carbylamine reaction
                      \n(c) Perkin\u2019s reaction
                      \n(d) Hoffmann mustard oil reaction
                      \nAnswer:
                      \n(d) Hoffmann mustard oil reaction<\/p>\n

                      Question 134.
                      \nDiazo – coupling reaction is useful to prepare some
                      \n(a) Dyes
                      \n(b) proteins
                      \n(c) pesticides
                      \n(d) plastics
                      \nAnswer:
                      \n(a) Dyes<\/p>\n

                      Question 135.
                      \nCarbylamine test is used in the detection of …………
                      \n(a) aliphatic 2\u00b0 amine
                      \n(b) Aromatic 1\u00b0 amine
                      \n(c) Aliphatic l amine
                      \n(d) both aliphatic and aromatic 1\u00b0 amine
                      \nAnswer:
                      \n(d) both aliphatic and aromatic 1\u00b0 amine<\/p>\n

                      Question 136.
                      \nWhich of the following amine will not react with nitrous acid to give nitrogen?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 137.
                      \nWhich of the following compound is expected to be more basic?
                      \n(a) Aniline
                      \n(b) Methylamine
                      \n(c) Ethylamine
                      \n(d) Hydroxylamine
                      \nAnswer:
                      \n(c) Ethylamine<\/p>\n

                      Question 138.
                      \nNitro group in Nitro benzene is a ………….
                      \n(a) ortho directing group
                      \n(b) Meta directing group
                      \n(c) Para directing group
                      \n(d) ortho and para directing group
                      \nAnswer:
                      \n(b) Meta directing group<\/p>\n

                      Question 139.
                      \nWhich of the following amines would undergo diazotisation?
                      \n(a) CH3<\/sub>NH2<\/sub>
                      \n(b) C2<\/sub>H5<\/sub>NH2<\/sub>
                      \n(c) C6<\/sub>H5<\/sub>NH2<\/sub>
                      \n(d) (CH3<\/sub>)2<\/sub>NH
                      \nAnswer:
                      \n(c) C6<\/sub>H5<\/sub>NH2<\/sub><\/p>\n

                      Question 140.
                      \nPrimary amines can be distinguished from secondary and tertiary amines by reacting with.
                      \n(a) CHCI3<\/sub> and alkali
                      \n(b) CH3<\/sub>I
                      \n(c) CHCl3<\/sub> alone
                      \n(d) Zn dust
                      \nAnswer:
                      \n(a) CHCI3<\/sub> and alkali<\/p>\n

                      Question 141.
                      \nA solution of methylamine …………..
                      \n(a) turns blue litmus red
                      \n(b) turns red litmus blue
                      \n(c) does not effect red or blue litmus
                      \n(d) Bleaches litmus
                      \nAnswer:
                      \n(b) turns red litmus blue<\/p>\n

                      Question 142.
                      \nOil of mirbane is ………..
                      \n(a) Aniline
                      \n(b) Nitro ethane
                      \n(c) p – amino azo benzene
                      \n(d) Nitro benzene
                      \nAnswer:
                      \n(d) Nitro benzene<\/p>\n

                      Question 143.
                      \nIdentify the product Z in the series of the reaction ………….
                      \n\"Samacheer
                      \n(a) CH3<\/sub>CHO
                      \n(b) CH3<\/sub>CONH2<\/sub>
                      \n(c) CH3<\/sub>COOH
                      \n(d) CH3<\/sub>CH2<\/sub>NHOH
                      \nAnswer:
                      \n(c) CH3<\/sub>COOH
                      \nSolution:
                      \n\"Samacheer<\/p>\n

                      Question 144.
                      \nPrimary and secondary amines are distinguished by ……….
                      \n(a) Br2<\/sub> \/ KOH
                      \n(b) HCIO4<\/sub>
                      \n(c) NH3<\/sub>
                      \n(d) HNO2<\/sub>
                      \nAnswer:
                      \n(d) HNO2<\/sub><\/p>\n

                      Question 145.
                      \nAniline on treatment with excess bromine water gives
                      \n(a) Anilinium bromide
                      \n(b) O – bromo aniline
                      \n(c) 2, 4, 6 – tribromo aniline
                      \n(d) p – bromo aniline
                      \nAnswer:
                      \n(c) 2, 4, 6 – tribromo aniline<\/p>\n

                      Question 146.
                      \nWhich of the following is not used as an explosive?
                      \n(a) Trinitro toluene
                      \n(b) Trinitro benzene
                      \n(c) Trinitro glycerine
                      \n(d) Nitro benzene
                      \nAnswer:
                      \n(d) Nitro benzene<\/p>\n

                      Question 147.
                      \nWhich of the following has a pyramidal structure?
                      \n(a) Trimethyl amine
                      \n(b) Water
                      \n(c) Acetylene
                      \n(d) Methane
                      \nAnswer:
                      \n(a) Trimethyl amine<\/p>\n

                      Question 148.
                      \nWhich one of the following reacts with benzaldehyde to give schiff\u2019s base.
                      \n(a) Acidified K2<\/sub>Cr2<\/sub>O7<\/sub>
                      \n(b) formaldehyde
                      \n(c) Aniline
                      \n(d) Potassium cyanide
                      \nAnswer:
                      \n(c) Aniline<\/p>\n

                      Question 149.
                      \nEthyl amine can be prepared by the action of bromine and caustic potash on
                      \n(a) Acetamide
                      \n(b) propionamide
                      \n(c) Formamide
                      \n(d) Methyl Eyanide
                      \nAnswer:
                      \n(b) propionamide<\/p>\n

                      Question 150.
                      \nWhich of the following reaction will not give primary amine?
                      \n\"Samacheer
                      \nAnswer:
                      \n\"Samacheer<\/p>\n

                      Question 151.
                      \nWhich of the following compound is the strongest base?
                      \n(a) Ammonia
                      \n(b) Aniline
                      \n(c) Methyl amine
                      \n(d) N – methyl aniline
                      \nAnswer:
                      \n(c) Methyl amine<\/p>\n

                      Question 152.
                      \nAzo dyes are prepared from ………….
                      \n(a) Phenol
                      \n(b) Aniline
                      \n(c) Benzaldehyde
                      \n(d) Both (i) and (ii)
                      \nAnswer:
                      \n(d) Both (i) and (ii)<\/p>\n

                      II. Fill in the blanks.<\/span><\/p>\n

                        \n
                      1. ………….. is an organic compound needed to maintain the health of nerves, skin and red blood cells.<\/li>\n
                      2. Plants synthesis and to protect them from being eaten away by insect ………….. and ………….. other animals.<\/li>\n
                      3. ………….. compounds are the important constituents of explosives, drugs, dyes, fuels, polymers, synthetic rubbers.<\/li>\n
                      4. Dopamine act as …………..<\/li>\n
                      5. ………….. dilates blood vessels.<\/li>\n
                      6. Tertiary nitro alkanes donot exhibit ………….. due to the absence of a-H atom.<\/li>\n
                      7. Aci form of nitro alkanes gives ………….. colour with ferric chloride.<\/li>\n
                      8. Aci form of nitro alkanes are otherwise called ………….. or …………..<\/li>\n
                      9. Laboratory preparation of Nitro ethane from ethyl bromide follows ………….. mechanism<\/li>\n
                      10. Except ………….. other alkanes gives a mixture of nitro alkanes due to C – C cleavage by nitration of alkanes.<\/li>\n
                      11. Oxidation of acetaldoxime with ………….. gives 1 – nitro ethane.<\/li>\n
                      12. ………….. is suspected to cause genetic damage and be harmful to the nervous system.<\/li>\n
                      13. Nitro benzene on reduction with SnCl2<\/sub> + KOH gives …………..<\/li>\n
                      14. Nitrobenzene on alkaline medium reduction gives …………..<\/li>\n
                      15. Amines posses ………….. geometry.<\/li>\n
                      16. The nitrogen atom in amine is ………….. hybridised.<\/li>\n
                      17. Gabriel phthalimide synthesis is used for the preparation of …………..<\/li>\n
                      18. Ammonolysis of hydroxyl compounds is called ………….. reaction.<\/li>\n
                      19. Aniline when exposed to air becomes coloured due to …………..<\/li>\n
                      20. Alkyl amines are stronger base than …………..<\/li>\n
                      21. Acylation and benzoylation of Aniline aer ………….. reactions.<\/li>\n
                      22. Libermann\u2019s nitroso test is used to detect …………..<\/li>\n
                      23. ………….. test is used to identify primary amine.<\/li>\n
                      24. Direct nitration of aniline gives O and P – nitro aniline along with ………….. due to oxidation.<\/li>\n
                      25. The conversion of benzene diazonium chloride to benzene by H3<\/sub>PO2<\/sub> proceeds through ………….. mechanism.<\/li>\n
                      26. Benzene diazonium chloride when boiled with water gives …………..<\/li>\n
                      27. The conversion of Benzene diazonium chloride is Biphenyl is called ………….. reaction.<\/li>\n
                      28. Coupling reaction generally occurs at ………….. position of Benzene ring.<\/li>\n
                      29. The condensation reaction of esters with nitrites containing a – hydrogen is known as …………..<\/li>\n
                      30. Chloropicrin is used as an …………..<\/li>\n
                      31. 4% solution of ethyl nitrite in alcohol is known as …………..<\/li>\n
                      32. Sweet spirit of nitre is used as …………..<\/li>\n
                      33. ………….. is used to produce lubricating oils in motors and machinery.<\/li>\n
                      34. ………….. an anti cancer agent used to treat stomach and colon cancer.<\/li>\n
                      35. Mitomycin C contains an ………….. ring.<\/li>\n
                      36. ………….. is used as percursor to explosive.<\/li>\n
                      37. An organic nitrogen compound ………….. is used as an insecticide.<\/li>\n
                      38. \u00a0………….. is known as sweet spirit of nitre.<\/li>\n
                      39. \u00a0Chloropicnn ………….. is used as an insecticide.<\/li>\n<\/ol>\n

                        Answer:<\/p>\n

                          \n
                        1. Pyridoxine, vitamin B6<\/sub><\/li>\n
                        2. alkaloids, biologically active amines<\/li>\n
                        3. Nitrogen<\/li>\n
                        4. Neurotransmitter<\/li>\n
                        5. Histamine<\/li>\n
                        6. tautomerism<\/li>\n
                        7. Reddish brown<\/li>\n
                        8. Pseudo acids (or) Nitronic acids<\/li>\n
                        9. SN2<\/sub><\/li>\n
                        10. Methane<\/li>\n
                        11. trifluoroperoxy acetic acid<\/li>\n
                        12. Nitro ethane<\/li>\n
                        13. Azobenzene<\/li>\n
                        14. Hydrazobenzene<\/li>\n
                        15. Pyramidal<\/li>\n
                        16. SP3<\/sup><\/li>\n
                        17. Aliphatic primary amines<\/li>\n
                        18. Sabatier – mailhe<\/li>\n
                        19. Oxidation<\/li>\n
                        20. Ammonia<\/li>\n
                        21. Nucleophilic substitution (or) Schotten Baumann<\/li>\n
                        22. Secondary amine<\/li>\n
                        23. Carbylamine reaction (or) Hoffmann mustard oil reaction<\/li>\n
                        24. dark coloured tars<\/li>\n
                        25. Free radical chain<\/li>\n
                        26. Phenol<\/li>\n
                        27. Gomberg<\/li>\n
                        28. Para<\/li>\n
                        29. Levine and hauser<\/li>\n
                        30. insecticide<\/li>\n
                        31. Sweet spirit of nitre<\/li>\n
                        32. diuretic<\/li>\n
                        33. Nitrobenzene<\/li>\n
                        34. Mitomycin C<\/li>\n
                        35. Aziridine<\/li>\n
                        36. Nitro ethane<\/li>\n
                        37. chloropicrm<\/li>\n
                        38. 4% solution of ethyl nifrite in alcohol<\/li>\n
                        39. CCI3<\/sub>NO2<\/sub><\/li>\n<\/ol>\n

                          III. Match the Column I and II using the code given below the columns.<\/span><\/p>\n

                          Question 1.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 3 4 2 1<\/p>\n

                          Question 2.
                          \n\"Samacheer
                          \nAnswer:
                          \n(b) 3 4 1 2<\/p>\n

                          Question 3.
                          \n\"Samacheer
                          \nAnswer:
                          \n(c) 3 4 1 2<\/p>\n

                          Question 4.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 4 3 1 2<\/p>\n

                          Question 5.
                          \n\"Samacheer
                          \nAnswer:
                          \n(b) 4 1 2 3<\/p>\n

                          Question 6.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 3 4 2 1<\/p>\n

                          Question 7.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 3 1 4 2<\/p>\n

                          Question 8.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 2 1 4 3<\/p>\n

                          Question 9.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 3 4 1 2<\/p>\n

                          Question 10.
                          \n\"Samacheer
                          \nAnswer:
                          \n(a) 4 1 2 3<\/p>\n

                          IV. Assertion and reasons.<\/span><\/p>\n

                          Question 1.
                          \nAssertion(A): Tertiary nitro alkanes do not exhibit tautomerism.
                          \nReason (R): Tertiary nitro alkanes do not have of \u03b1 – H atom.
                          \n(a) Both A and R are correct and R is explains A
                          \n(b) Both A and R are not correct
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is explains A<\/p>\n

                          Question 2.
                          \nAssertion(A): Primary and secondary nitroalkanes show an equilibrium mixture of two tautomers namely nitro and aci form.
                          \nReason (R): Both primary and secondary nitroalkanes are having a-H atoms.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of ofA
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 3.
                          \nAssertion(A): Nitro alkanes dissolve in NaOH solution to form a salt.
                          \nReason (R): The \u03b1 – H atom of 1\u00b0 and 2\u00b0 nitroalkanes show acidic character because of the electron withdrawing effect of NO2<\/sub> group.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 4.
                          \nAssertion(A): 2 – nitro propane is more acidic than nitro mehtane.
                          \nReason (R): When the number of alkyl group attached to a carbon increases, acidity decreases. due to +1 effect of alkyl groups.
                          \n(a) Both A and R are correct but R is not the correct explanation of of A
                          \n(b) Both A and R are correct and R is the correct explanation of A
                          \n(c) A is correct but R is wrong.
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(d) A is wrong but R is correct<\/p>\n

                          Question 5.
                          \nAssertion(A): Nitrobenzene cannot be prepared from bromo benzene by action of ethanolic solution of potassium nitrite.
                          \nReason (R): The bromine directly attached to the benzene ring cannot be cleaved easily.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 6.
                          \nAssertion(A): Nitrobenzene undergoes friedel – craft reaction.
                          \nReason (R): Nitrobenzene have strong deactivating – NO2<\/sub> group.
                          \n(a) Both A and R arc correct but R is not the correct explanation of A
                          \n(b) Both A and R are correct and R is the correct explanation of A
                          \n(c) A is wrong but R \u00a1s correct
                          \n(d) A is correct but R is wrong
                          \nAnswer:
                          \n(c) A is wrong but R \u00a1s correct<\/p>\n

                          Question 7.
                          \nAssertion(A): Amines posses pyramidal geometry.
                          \nReason (R): Nitrogen atoms of amines is trivalent and has four sp3 hybridised orbital. Three sp3<\/sup> orbitais overlap with orbitais of hydrogen and four sp3 orbitais contain a lone pair of electrons.
                          \n(a) Both A and R are correct and R \u00a1s the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong.
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R \u00a1s the correct explanation of A<\/p>\n

                          Question 8.
                          \nAssertion(A): The C – N – C bond angle of trimethyl amine is 108\u00b0.
                          \nReason (R): The bond angle of C – N – C is due to the repulsion between the bulky methyl groups.
                          \n(a) Both A and R are wrong
                          \n(b) A is correct and R is wrong
                          \n(c) Both A and R are correct and R is the correct explanation of A
                          \n(d) Both A and R are correct but R is not the correct explanation of A
                          \nAnswer:
                          \n(c) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 9.
                          \nAssertion(A): Aniline cannot be prepared by Gabriel phthalimide synthesis.
                          \nReason (R): Arylhalides do not undergo nucleophilic substitution with the anion formed by phthalimide
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 10.
                          \nAssertion(A): Amines have lower boiling point than alcohols.
                          \nReason (R): Nitrogen has lower electronegative value than oxygen and hence the N – H bond is less polar than – OH bond.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 11.
                          \nAssertion(A): Tertiary methyl amine is less soluble in water than methyl amine.
                          \nReason (R): Solubility decreases due to the increase in size of the hydrophobic alkyl group.
                          \n(a) Both A and R are wrong
                          \n(b) A is correct but R is wrong.
                          \n(c) Both A and R are correct and R is the correct explanation of A
                          \n(d) Both A and R are correct but R is not the correct explanation of A
                          \nAnswer:
                          \n(c) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 12.
                          \nAssertion(A): Aniline reacts with acids to form salts and also reacts with electrophiles.
                          \nReason (R): The lone pair of electrons on nitrogen atom in amines makes them basic as well as nucleophilic.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 13.
                          \nAssertion(A): Alkyl amines are stronger base than Ammonia.
                          \nReason (R): When a +I gorup like alkyl group is attached to nitrogen increases the electron density on the nitrogen which makes the electron pair readily available for protonation.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is wrong but R is correct
                          \n(d) A is correct but R is wrong
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 14.
                          \nAssertion(A): 2\u00b0 amines are more basic.
                          \nReason (R): Due to + I effect, steric effect and hydration effect cause 2\u00b0 amines are more basic.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 15.
                          \nAssertion(A): Aromatic amines are less basic than ammonia.
                          \nReason (R): The lone pair of electrons on nitrogen atom in aniline (aromatic amine) gets delocalised over the benzene ring and less available for protonation.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are wrong
                          \n(c) A is correct but R is wrong.
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 16.
                          \nAssertion(A): Electrophilic substituion in aniline take place at ortho and para position.
                          \nReason (R): The – NH2<\/sub> group is a strong activating group and lone pair of electrons on the nitrogen atom is in conjugation with benzene ring that increases electron density at ortho and para position.
                          \n(a) Both A and R are correct and R is the correct explanation of A
                          \n(b) Both A and R are correct but R is not the correct explanation of A
                          \n(c) A is correct but R is wrong.
                          \n(d) Both A and R are wrong
                          \nAnswer:
                          \n(a) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 17.
                          \nAssertion(A): Acylation of amines gives a mono substituted product whereas alkylation of amines gives polysubstituted product.
                          \nReason (R): Acyl group sterically hindered the approach to further acyl group.
                          \n(a) Both A and R are wrong
                          \n(b) A is correct but R is wrong
                          \n(c) Both A and R are correct and R is the correct explanation of A
                          \n(d) Both A and R are correct but R is not the correct explanation of A
                          \nAnswer:
                          \n(c) Both A and R are correct and R is the correct explanation of A<\/p>\n

                          Question 18.
                          \nAssertion(A): Acetanilide is less basic than anime.
                          \nReason (R): Acetylation of aniline results in the decrease of electron density on nitrogen.
                          \n(a) Both A and R are correct and R explains A.
                          \n(b) Both A and R are wrong
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R explains A.<\/p>\n

                          Question 19.
                          \nAssertion(A): Aromatic 1\u00b0 amines can be prepared by Gabriel phthalimide synthesis.
                          \nReason (R): Aryl halides undergo nucleophilic substitution with the anion formed by phthalimide.
                          \n(a) Both A and R are correct and R is explains A
                          \n(b) Both A and R are wrong
                          \n(c) A is correct but R is wrong
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(b) Both A and R are wrong<\/p>\n

                          Question 20.
                          \nAssertion(A): Aniline does not undergo Friedel – Crafts reaction.
                          \nReason (R): Aniline donates its lone pair of electrons to the Lewis acid AiCl3<\/sub> to form an adduct which inhibits further electrophilic substitution reaction.
                          \n(a) Both A and R are correct and R is explains A.
                          \n(b) Both A and R are wrong
                          \n(c) A is correct but R is wrong.
                          \n(d) A is wrong but R is correct
                          \nAnswer:
                          \n(a) Both A and R are correct and R is explains A.<\/p>\n

                          V. Find the odd one out and give the reasons.<\/span><\/p>\n

                          Question 1.
                          \nPyridoxine, Dopamine, Histamine, Aspirin.
                          \nAnswer:
                          \nAspirin:
                          \nIt is acid derivative and used as medicine whereas other are organic nitrogen compounds used in medicine.<\/p>\n

                          Question 2.
                          \nTrinitro glycerine, Glyceryl triacetate, Trinitro benzene, Trinitro toluene
                          \nAnswer:
                          \nGlyceryl triacetate:
                          \nIt is a an ester of glycerol whereas others are organic nitrogen compounds used in making explosives.<\/p>\n

                          Question 3.
                          \nN – methyl methanamine, N – methyl ethanamine, N – phenyl benzamide, N,N – dimethyl methanamine
                          \nAnswer:
                          \nN,N – dimethyl methanamine: It \u00a1s an example of tertiary amine whereas others are secondary amine.<\/p>\n

                          Question 4.
                          \nPropan – 2 – amine, N – ethyl – N – methyl, propan – 2 – amine, N,N – dimethyl methanamine, N, N – diethyl butan – 1 – amine
                          \nAnswer:
                          \nPropan – 2 – amine:
                          \nIt is a secondary amine whereas others are tertiary amines.<\/p>\n

                          Question 5.
                          \nP – hydroxy azo benzene, Hydrazo benzene, P – amino azo benzene, 2 – Phenyl azo – methyl phenol
                          \nAnswer:
                          \nHydrazo benzene: It is not a dye whereas others are dyes.<\/p>\n

                          Question 6.
                          \nMethyl ISo cyanide, Methyl cyanide, Acetic anhydride, Ethyl amine Nitro ethane
                          \nAnswer:
                          \nAcetic anhydride:
                          \nIt is an acid derivative whereas others are organic nitrogen compounds.<\/p>\n

                          Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds 2 Mark Questions and Answers<\/strong><\/span><\/p>\n

                          Question 1.
                          \nWhat is called nitro compound? Give one example.
                          \nAnswer:
                          \n1. Ntiro compounds are considered as the derivatives of hydrocarbons. 1f one of the hydrogen atom of hydrocarbon is replaced by the – NO2<\/sub> group, the resultant organic compound is called a ntiro compound.<\/p>\n

                          2. E.g., CH3<\/sub> – CH2<\/sub> – NO2<\/sub>. Nitro ethane<\/p>\n

                          Question 2.
                          \nDefine Tautomerism. Give example. Why tertiary nitro alkanes do not ethibit tautomerism?
                          \nAnswer:
                          \n1. Tautomerism is an isomerism in which the isomers change into one another with great ease of shifting of proton so that they exist together in equilibrium.
                          \n\"Samacheer<\/p>\n

                          2. Tertiary nitro alkanes do not exhibit tautomerism due to absence of a-H atom.<\/p>\n

                          Question 3.
                          \nDifferentiate between nitro form and acid form of tautomerism of nitro methane.
                          \nAnswer:
                          \nNitro form<\/p>\n

                            \n
                          1. Less acidic<\/li>\n
                          2. Dissolves in NaOH slowly.<\/li>\n
                          3. Decolourises FeCl3<\/sub> solution.<\/li>\n
                          4. Electrical conductivity is low.<\/li>\n<\/ol>\n

                            Aci form<\/p>\n

                              \n
                            1. More acidic and also called pseudo acids (or) Nitrolic acids.<\/li>\n
                            2. Dissolves in NaOH instantly.<\/li>\n
                            3. With FeCI3<\/sub> gives reddish brown colour.<\/li>\n
                            4. Electrical conductivity is high.<\/li>\n<\/ol>\n

                              Question 4.
                              \nCompare the acid strength of the following compounds<\/p>\n

                                \n
                              1. Nitro methane<\/li>\n
                              2. Nitro ethane<\/li>\n
                              3. 2 – nitro propane.<\/li>\n<\/ol>\n

                                Answer:
                                \n1. The \u03b1 – H atom of 10<\/sup> and 20<\/sup> nitroalkanes show acidic character because of the electron withdrawing effect of NO2<\/sub> group.<\/p>\n

                                2. Nitroalkanes dissolve in NaOH solution to form a salt.<\/p>\n

                                3. When the number of alkyl group attached to a carbon increases, acidity decreases. due to +1 effect of alkyl groups.
                                \n\"Samacheer<\/p>\n

                                Question 5.
                                \nNitro benzene cannot be prepared from Bromo benzene by direct nitration. Give reason.
                                \nAnswer:
                                \nNitro benzene cannot be prepared from Bromo benzene because the bromine directly attached to the benzene ring cannot be cleaved easily.<\/p>\n

                                Question 6.
                                \nHow would you convert Acetaldoxime into Nitroethane?
                                \nAnswer:
                                \nOxidation of acetaldoxime and with trifluoro peroxy acetic acid gives nitroethane.
                                \n\"Samacheer<\/p>\n

                                Question 7.
                                \nHow is nitrobenzene from benzene?
                                \nAnswer:
                                \nWhen benzene is heated with a nitrating mixture (Con.HNO3<\/sub> + Con.H2<\/sub>SO4<\/sub>), at 330 K, electrophilic substitution takes place to form nitro benzene.
                                \n\"Samacheer<\/p>\n

                                Question 8.
                                \nHow will you prepare p – dinitrobenzene from p – nitroanlline?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 9.
                                \nHow is amino group can be directly converted into nitro group? Explain with an example.
                                \nAnswer:
                                \nAmino group can be directly converted into nitro group using caro\u2019s acid (H2<\/sub>SO5<\/sub>) (or) persuiphuric acid (H2<\/sub>S2<\/sub>O8<\/sub>) (or) peroxytrifluro acetic acid (F3<\/sub>C.COOOH) as oxidising agent.
                                \n\"Samacheer<\/p>\n

                                Question 10.
                                \nExplain the action of tin and hydrochloric acid with ethyl nitrite.
                                \nAnswer:
                                \nEthyl nitrite on reduction with Sn \/ HCI gives ethanol.
                                \n\"Samacheer<\/p>\n

                                Question 11.
                                \nExplain about the acid (or) basic hydrolysis of ethyl nitrite.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 12.
                                \nWhat is Chioropicrin? How is \u00a1t prepared? Give its uses.
                                \nAnswer:
                                \nCCI3<\/sub>NO2<\/sub> is Chioropicrin. It is prepared from nitro methane with Cl2<\/sub> in the presence of NaOH. The a – H atom of nitroalkanes are successively replaced by halogen atoms. It is used as an insecticide.
                                \n\"Samacheer<\/p>\n

                                Question 13.
                                \nExplain – Nef carbonly synthesis.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 14.
                                \nWhat happens when nitrobenzene Is treated with Ni (or) Pt (or) LiAIH4<\/sub>?
                                \nAnswer:
                                \nNitrobenzene undergoes reduction with Ni (or) Pt (or) LiAlH4<\/sub> to give aniline.
                                \n\"Samacheer<\/p>\n

                                Question 15.
                                \nWrite a note about structure of Amines.
                                \nAnswer:
                                \n1. Nitrogen atom of amines is trivalent and carries a lone pair of electron and sp3<\/sup> hybridised, out of the four sp3<\/sup> hybridised orbitais of nitrogen, three sp3<\/sup> orbitais overlap with orbitais of hydrogen (or) alkyl groups of carbon, the fourth sp3<\/sup> orbital contains a lone pair of electron. Hence, amines posses pyramidal geometry.
                                \n\"Samacheer<\/p>\n

                                2. Due to presence of lone pair of electron C – N – H (or) C – N – Cbond angle is less than the normal tetrahedral bond angle 109.5v. For example, the C – N – C bond angle of trimethylamine is 108\u00b0. This is due to the repulsion between the bulky methyl groups.<\/p>\n

                                Question 16.
                                \nHow would you convert Nitroethane to ethanamine?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 17.
                                \nExplain the action of Pt (or) Sn\/HCI with nitrobenzene.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 18.
                                \nExplain mendlus reaction.
                                \nAnswer:
                                \nReduction of alkyl or aryl cyanides with Na \/ C2<\/sub>H5<\/sub>OH is used as a reducing agent is called mendius reaction.
                                \n\"Samacheer<\/p>\n

                                Question 19.
                                \nExplain the action of sodium amalgum and ethanol with Methyl isocyanide.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 20.
                                \nWhat happens when sodium azide is treated with methyl bromide?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Quesion 21.
                                \nHow would you convert chiorobenzene to aniline?
                                \nAnswer:
                                \nWhen chiorobenzene is heated with alcoholic ammonia, aniline is obtained.
                                \n\"Samacheer<\/p>\n

                                Question 22.
                                \nExplain Sabatier – MalIhe method.
                                \nAnswer:
                                \nwhen vapour of an alcohol and ammonia are passed over alumina, W2<\/sub>O5<\/sub> (or) silica at 400\u00b0C, all types of amines are formed. This method is called Sabatier – Mailhe method.
                                \n\"Samacheer<\/p>\n

                                Question 23.
                                \nConvert phenol into aniline.
                                \nAnswer:
                                \nPhenol reacts with ammonia at 300\u00b0C in the presence of anhydrous ZnCl2<\/sub> to give aniline.
                                \n\"Samacheer<\/p>\n

                                Question 24.
                                \nCompare the boiling points of 10, 2\u00b0 and 3\u00b0 amInes.
                                \nAnswer:
                                \n1. The boiling point of various amines follows the order,
                                \n\"Samacheer<\/p>\n

                                2. Due to the polar nature of primary and secondary amines, can form intermolecular hydrogen bonds using their lone pair of electron on nitrogen atom. However, tertiary amines do not form intermolecular hydrogen bond and they have lower boiling point than 1\u00b0 and 2\u00b0 amines.<\/p>\n

                                Question 25.
                                \nAniline is basic in nature. Justify this statement.
                                \nAnswer:
                                \nThe lone pair of electrons on nitrogen atom in aniline makes it base. Aniline reacts with mineral acids to form salt.
                                \n\"Samacheer<\/p>\n

                                Question 26.
                                \nAlkyl amines are stronger bases than ammonia. Justify this statement.
                                \nAnswer:
                                \nWhen a + I group like and alkyl group is attached to the nitrogen increase the electron density on nitrogen which makes the electron pair readily available for protonation. Hence alkyl amines are stronger than ammonia.
                                \n\"Samacheer<\/p>\n

                                Question 27.
                                \nExplain the action of acretyl chloride with ethyl amine?
                                \n\"Samacheer<\/p>\n

                                Question 28.
                                \nWhat happens when ethylamine reacts with nitrous acid?
                                \nAnswer:
                                \nEthylamine reacts with nitrous acid to give ethyl diazonium chloride, which is unstable and it is converted to ethanol by liberating N2<\/sub>.
                                \n\"Samacheer<\/p>\n

                                Question 29.
                                \nExplain the action of nitrous acid with N – methyl aniline.
                                \nAnswer:
                                \nN – methyl aniline react with nitrous acid to give N – nitroso amine as yellow oily liquid which is insoluble in water.
                                \n\"Samacheer<\/p>\n

                                Question 30.
                                \nExplain the action of nitrous acid with trimethyl amine.
                                \nAnswer:
                                \nAliphatic tertiary amine reacts with nitrous acid to form trialkyl ammonium nitrite salt, which is soluble in water.
                                \n\"Samacheer<\/p>\n

                                Question 31.
                                \nWhat happens when nitrous acid is treated iith N, N – dimethyl aniline?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 32.
                                \nExplain Hoffmann mustard oil reaction. (or) Explain the action of CS2<\/sub> with aniline.
                                \nAnswer:
                                \nWhen aniline is treated with CS2<\/sub>, or heated together, S – diphenylthio urea is formed, which on boiling with strong HCI , phenyl isothiocyanate (phenyl mustard oil), is formed.
                                \n\"Samacheer
                                \nThe above reaction is known as Hoffmann mustard oil reaction.<\/p>\n

                                Question 33.
                                \nExplain the action of Br2<\/sub>water with aniline.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 34.
                                \nHow would you prepare p – bromo aniline from aniline?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 35.
                                \nHow would you prepare p – nitro from aniline?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 36.
                                \nExplain the action of hypophosphrous acid with Benzene diazonium chloride. (or) Explain the action of ethanol with benzene diazonium chloride.
                                \n\"Samacheer<\/p>\n

                                Question 37.
                                \nExplain Gattermann reaction.
                                \nAnswer:
                                \nGattermann reaction.
                                \n\"Samacheer<\/p>\n

                                Question 38.
                                \nHow would you get iodo benzene form benzene diazonium chloride.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 39.
                                \nExplain Baltz – schiemann reaction.
                                \nAnswer:
                                \nWhen benzene diazonium chloride is treated with fluoroboric acid, benezene diazonium tetra fluoroborate is precipitated which on heating decomposes to give fluorobenzene.
                                \n\"Samacheer<\/p>\n

                                Question 40.
                                \nConvert Benzene diazonium chloride into phenol.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 41.
                                \nStartIng form Benzene diazonium chloride, how will you get Nitrobenzene?
                                \nAnswer:
                                \nWhen benzene diazonium chloride is treated with fluoroboric acid we get diazonium fluoroborate which on treated with sodium nitrite solution in the presence of copper, nitrobenzene is obtained.
                                \n\"Samacheer<\/p>\n

                                Question 42.
                                \nConvert benzene diazonium chloride to benzoic acid
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 43.
                                \nExplain the action of SnCl2<\/sub> and HCl with benzene diazonium chloride.
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 44.
                                \nStarting from benzene diazonium chloride, how would you get bright organge azo dye?
                                \nAnswer:
                                \n\"Samacheer<\/p>\n

                                Question 45.
                                \nWrite the structural formula and TUPAC name of the following compounds.<\/p>\n

                                  \n
                                1. Isobutyl nitrite<\/li>\n
                                2. Benzo nitrile<\/li>\n<\/ol>\n

                                  Answer:
                                  \n1. Isobutyl nitrite
                                  \n\"Samacheer
                                  \n2 – methyll propane nitrile<\/p>\n

                                  2. Benzo nitrile C6<\/sub>H5<\/sub>CN Benzene carbo nitrile<\/p>\n

                                  Question 46.
                                  \nDraw the structural formula of<\/p>\n

                                    \n
                                  1. 3 – cyano butanoic acid<\/li>\n
                                  2. 2 – bromo – 3 – chloro – 3 – methyl pentane nitrile.<\/li>\n<\/ol>\n

                                    Answer:
                                    \n1. 3 – cyano butanoic acid
                                    \n\"Samacheer<\/p>\n

                                    2. 2 – bromo – 3 – chloro
                                    \n\"Samacheer
                                    \n– 3 – methyl pentane nitrile<\/p>\n

                                    Question 47.
                                    \nHow will you get propane nitrile from ethyl bromide?
                                    \nAnswer:
                                    \n\"Samacheer<\/p>\n

                                    Question 48.
                                    \nStarting from methyl magnesium bromide, how would you obtain ethane nitrile?
                                    \nAnswer:
                                    \n\"Samacheer<\/p>\n

                                    Question 49.
                                    \nExplain thrope nitrite condensation.
                                    \nAnswer:
                                    \nSelf condensation of two molecules of alkyl nitrile in the presence of sodium to form iminonitrile is called Thrope nitnie condensation.
                                    \n\"Samacheer<\/p>\n

                                    Question 50.
                                    \nExplain Levine and hauser acetylation.
                                    \nAnswer:
                                    \nThe nitrites containing \u03b1 – hydrogen also undergo condensation with esters in the presence of sodamide in ether to form ketoriitriles. This reaction is known as Levine and hauser acetylation.
                                    \n\"Samacheer<\/p>\n

                                    Question 51.
                                    \nHow would you prepare the following compounds by carbylamines reaction.<\/p>\n

                                      \n
                                    1. Methyl isocyanide<\/li>\n
                                    2. Phenyl isocyanide<\/li>\n<\/ol>\n

                                      Answer:
                                      \n1. \"Samacheer<\/p>\n

                                      2. \"<\/p>\n

                                      Question 52.
                                      \nComplete the following reactions.
                                      \n\"
                                      \nAnswer:
                                      \n\"<\/p>\n

                                      Question 53.
                                      \nHow is methyl isocyanide changed to methyl cyanide?
                                      \nAnswer:
                                      \n\"<\/p>\n

                                      Question 54.
                                      \nWhat are the uses of nitrobenzene?
                                      \nAnswer:<\/p>\n

                                        \n
                                      1. Nitro benzene is used to produce lubricating oils in motors and machinery.<\/li>\n
                                      2. It is used in the manufacture of dyes, drugs, pesticides, synthelic rubber, aniline and explosives like TNT, TNB.<\/li>\n<\/ol>\n

                                        Question 55.
                                        \nPrimary amines have higher boiling points than tertiary amines why?
                                        \nAnswer:
                                        \nDue to the presence of two H – atom on N – atoms of primary amines they undergo extensive intermolecular H – bonding while tertiary amines due to the absence of a H – atom on the N – atom do not undergo H – bonding. As a result primary amines have higher boiling points than tertiary amines.<\/p>\n

                                        Question 56.
                                        \nHow is m – nitroaniline obtained from nitrobenzene?
                                        \nAnswer:
                                        \n\"<\/p>\n

                                        Question 57.
                                        \nHow is aniline obtained from benzoic acid?
                                        \nAnswer:
                                        \n\"<\/p>\n

                                        Question 58.
                                        \nHow will you convert benzene into aniline?
                                        \nAnswer:
                                        \n\"<\/p>\n

                                        Question 59.
                                        \nHow will you distinguish between.
                                        \n\"
                                        \nAnswer:
                                        \n1. By reacting with NaNO2<\/sub> and HCl at the temperature of around 0 to 5\u00b0C, Aniline will from diazonium salt. CH3<\/sub>NH2<\/sub> will form methanol and bubbles of N2<\/sub> gas will come out of the solution.<\/p>\n

                                        2. By Hinsberg\u2019s reagent, C6<\/sub>H5<\/sub>SO2<\/sub>CI(CH3<\/sub>)3<\/sub>N will not react. (CH3<\/sub>)2<\/sub>NH will form a product which is insoluble in alkali.<\/p>\n

                                        Question 60.
                                        \nAccount for any two of the following.<\/p>\n

                                          \n
                                        1. Amines are basic substances while amides are neutral.<\/li>\n
                                        2. Aromatic amines are weaker bases than aliphatic amines.<\/li>\n<\/ol>\n

                                          Answer:
                                          \n1. In amines alkyl group is an electron releasing group which increases the electron density on nitrogen thus making them basic whereas in amides
                                          \n\"
                                          \ngroup is electron withdrawing, therefore they are neutral.<\/p>\n

                                          2. It is because aryl group is an electron withdrawing group which decreases electron density on nitrogen atom, making them less basic whereas alkyl group is electron releasing which makes alkylamines more basic.<\/p>\n

                                          Question 61.<\/p>\n

                                            \n
                                          1. Assign a reason for the following statements – Alkylamines are stronger bases than arylamines.<\/li>\n
                                          2. How would you convert methylamine into ethylamine?<\/li>\n<\/ol>\n

                                            Answer:
                                            \n1. It is because in arylamines the – NH2<\/sub> group is attached directly to the benzene ring. It results in the unshared electron pair on nitrogen atom to be in conjugation with the benzene ring and thus making it less available for protonation whereas alkyl group are electron releasing group.<\/p>\n

                                            2. \"<\/p>\n

                                            Question 62.<\/p>\n

                                              \n
                                            1. How will you convert an alkyl halide to a primary amine whose molecule has one carbon atom more than the used alkyl halide molecule?<\/li>\n
                                            2. Why are amines more basic than the comparable alcohols.<\/li>\n<\/ol>\n

                                              Answer:
                                              \n1.
                                              \n\"<\/p>\n

                                              2. Due less electronegativity of oxygen atom as compared to nitrogen, amines are more basic than alcohols.<\/p>\n

                                              Question 63.
                                              \nAniline gets coloured on standing in air for a long time. Why?
                                              \nAnswer:
                                              \nDue to strong electron – donating effect (+ R effect) of NH2<\/sub> group, the electron density on the benzene ring increases. As a result, aniline is easily oxidised on standing in air for a long time to form coloured products.<\/p>\n

                                              Question 64.
                                              \nCH3<\/sub>CONH2<\/sub> is a weaker base than CH3<\/sub>CH2<\/sub>NH2<\/sub>. Why?
                                              \nAnswer:
                                              \nDue to resonance, the lone pair of electrons on the nitrogen atom in CH3<\/sub>CONH2<\/sub> is delocalised over the keto group. There is no such effect ip CH3<\/sub>CH2<\/sub>NH2<\/sub>. Due to reduction in electron density on N – atom of CH3<\/sub>CONH2<\/sub>, it is a weaker base than CH3<\/sub>CH2<\/sub>NH2<\/sub>.<\/p>\n

                                              Question 65.
                                              \nWrite chemical equation for the following conversions:<\/p>\n

                                                \n
                                              1. CH3<\/sub>CH2<\/sub> – Cl into CH3<\/sub>CH2<\/sub>CH2<\/sub> – NH2<\/sub><\/li>\n
                                              2. C6<\/sub>H5<\/sub> – CH2<\/sub> – Cl into C6<\/sub>H5<\/sub>CH2<\/sub>CH2<\/sub>NH2<\/sub><\/li>\n<\/ol>\n

                                                Answer:
                                                \n1. \"<\/p>\n

                                                2. \"<\/p>\n

                                                Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds 3 Marks Questions and Answers<\/strong><\/span><\/p>\n

                                                Question 1.
                                                \nWrite about the classification of organic nitro compounds.
                                                \nAnswer:
                                                \n\"Samacheer<\/p>\n

                                                2. Draw the structural formula of the following compounds.<\/p>\n

                                                  \n
                                                1. 2 – methyl – 1 – nltropropane<\/li>\n
                                                2. 2, 2 – dimethyl – 1 – nitropropane<\/li>\n
                                                3. Nitrobenzene<\/li>\n<\/ol>\n

                                                  Answer:
                                                  \n1. \"Samacheer\u00a02 – methyl – 1 – nitropropane
                                                  \n2. \"Samacheer\u00a02, 2 – dimethyl – 1- nitropropane
                                                  \n3. \"Samacheer\u00a0Nitrobenzene<\/p>\n

                                                  Question 3.
                                                  \nDraw the structural formula of the following compounds.<\/p>\n

                                                    \n
                                                  1. 2 – nitro – 1 – methyl benzene<\/li>\n
                                                  2. 1, 3, 5 – trinitrobenzene<\/li>\n
                                                  3. 2 – phenyl – 1 – nitroethane<\/li>\n<\/ol>\n

                                                    Answer:
                                                    \n1. \"Samacheer\u00a0 \u00a0 2 – nitro – 1 – methyl benzene
                                                    \n2. \"Samacheer\u00a01, 3, 5 – trinitrobenzene
                                                    \n3. \"Samacheer2 – phenyl – 1 – nitroethane<\/p>\n

                                                    Question 4.
                                                    \nWrite the possible isomers for the formula C4<\/sub>H9<\/sub>NO2<\/sub>.
                                                    \nAnswer:
                                                    \n\"Samacheer<\/p>\n

                                                    Question 5.
                                                    \nHow would you prepare nitro ethane from the following compounds?<\/p>\n

                                                      \n
                                                    1. CH3<\/sub> – CH2<\/sub>Br<\/li>\n
                                                    2. CH3<\/sub> – CH3<\/sub><\/li>\n<\/ol>\n

                                                      Answer:
                                                      \n1. \"Samacheer
                                                      \n2. \"Samacheer<\/p>\n

                                                      Question 6.
                                                      \nMention any two methods of preparation of nitro methane.
                                                      \nAnswer:
                                                      \n1. \"Samacheer
                                                      \n2. \"Samacheer<\/p>\n

                                                      Question 7.
                                                      \nExplain the<\/p>\n

                                                        \n
                                                      1. acid medium reduction<\/li>\n
                                                      2. neutral medium reduction of Nitromethane.<\/li>\n<\/ol>\n

                                                        Answer:
                                                        \n\"Samacheer<\/p>\n

                                                        Question 8.
                                                        \nWhat happens when hydrochloric acid is treated with<\/p>\n

                                                          \n
                                                        1. Nitro ethane<\/li>\n
                                                        2. 2 – nitropropane<\/li>\n
                                                        3. 2 – methyl – 2 – nitro propane<\/li>\n<\/ol>\n

                                                          (or)
                                                          \nHow would you distinguish 1\u00b0, 2\u00b0, 3\u00b0 nitro compounds?
                                                          \nAnswer:
                                                          \n1. \"Samacheer
                                                          \n2. \"Samacheer
                                                          \n3. \"Samacheer<\/p>\n

                                                          Question 9.
                                                          \nExplain the following reactions using nitro benzene.<\/p>\n

                                                            \n
                                                          1. Chlorination<\/li>\n
                                                          2. Nitration<\/li>\n
                                                          3. Suiphonation<\/li>\n<\/ol>\n

                                                            Answer:
                                                            \n1. \"Samacheer
                                                            \n2. \"Samacheer
                                                            \n3. \"Samacheer<\/p>\n

                                                            Question 10.
                                                            \nGive the structural formula and IUPAC name of the following compounds.<\/p>\n

                                                              \n
                                                            1. Isopropvl amine<\/li>\n
                                                            2. Allyl amine<\/li>\n
                                                            3. Hexamethyl diamine<\/li>\n<\/ol>\n

                                                              Answer:
                                                              \n1. Isopropvl amine\"Samacheer\u00a0 Propan – 2 – amine
                                                              \n2. Allyl amine \"Samacheer\u00a0 Prop – 2 – en – 1 – amine
                                                              \n3. Hexamethyl diamine \"Samacheer\u00a0Hexane 1, 6 – diamine<\/p>\n

                                                              Question 11.
                                                              \nDraw the structural formula and write the IUPAC name of<\/p>\n

                                                                \n
                                                              1. Methyl isopropyl amine<\/li>\n
                                                              2. Diethyl butyl amine<\/li>\n
                                                              3. Ethyl methyl ispropylamine<\/li>\n<\/ol>\n

                                                                Answer:
                                                                \n1. Methyl isopropyl amine:
                                                                \n\"Samacheer
                                                                \nN – methyl propan – 1 – amine<\/p>\n

                                                                2. Diethyl butyl amine:
                                                                \n\"Samacheer
                                                                \nN, N – diethyl butan – 1 – amine<\/p>\n

                                                                3. Ethyl methyl ispropylamine:
                                                                \n\"Samacheer
                                                                \nN – ethyl – N – methyl propan – 2 – amine<\/p>\n

                                                                Question 12.
                                                                \nDraw the structural formula and write the IUPAC name of …………..<\/p>\n

                                                                  \n
                                                                1. N, N – dimethyl aniline<\/li>\n
                                                                2. Benzyl amine<\/li>\n
                                                                3. N – methyl benzylamine<\/li>\n<\/ol>\n

                                                                  Answer:
                                                                  \n1. N, N – dimethyl aniline
                                                                  \n\"Samacheer<\/p>\n

                                                                  2. Benzyl amine
                                                                  \n\"Samacheer<\/p>\n

                                                                  3. N – methyl benzylamine
                                                                  \n\"Samacheer<\/p>\n

                                                                  Question 13.
                                                                  \nExplain the alkylation reaction of methylamine with equation.
                                                                  \nAnswer:
                                                                  \nAlkylation:
                                                                  \nPrimary amines reacts with alkyl halides to give successively 2\u00b0 and 3\u00b0 amines and quaternary ammonium salts.
                                                                  \n\"Samacheer<\/p>\n

                                                                  Question 14.
                                                                  \nExplain about the suiphonation reaction of aniline.
                                                                  \nAnswer:
                                                                  \nAniline reacts with Conc. H2<\/sub>SO4<\/sub> to form anilinium hydrogen sulphate which on heating with H2<\/sub>SO4<\/sub> at 453 – 473K gives p – aminobenzene suiphonic acid, commonly known as suiphanilic acid, as the major product.
                                                                  \n\"Samacheer<\/p>\n

                                                                  Question 15.
                                                                  \nExplain Sandmeyer reaction with example.
                                                                  \nAnswer:
                                                                  \nOn mixing freshly prepared solution of benzene diazonium chloride with cuprous halides, aryl halides are formed. This reaction is called Sandmeyer reaction.
                                                                  \n\"Samacheer<\/p>\n

                                                                  Question 16.
                                                                  \nWrite the structural formula and IUPAC name of the following compounds.<\/p>\n

                                                                    \n
                                                                  1. Methyl cyanide<\/li>\n
                                                                  2. Propionitrile<\/li>\n
                                                                  3. Butyro nitrile<\/li>\n<\/ol>\n

                                                                    Answer:<\/p>\n

                                                                      \n
                                                                    1. CH3<\/sub>CN – Ethane nitrile<\/li>\n
                                                                    2. CH3<\/sub> – CH2<\/sub>CN – Propane nitrile<\/li>\n
                                                                    3. CH3<\/sub> – CH2<\/sub> – CH2<\/sub>CN – Butane nitnie.<\/li>\n<\/ol>\n

                                                                      Question 17.
                                                                      \nHow would you produce Ethane nitrite form the following compounds?<\/p>\n

                                                                        \n
                                                                      1. Acetamide<\/li>\n
                                                                      2. Ammonium acetate<\/li>\n
                                                                      3. Acetaldoxime<\/li>\n<\/ol>\n

                                                                        Answer:
                                                                        \n1. \"Samacheer
                                                                        \n2. \"Samacheer
                                                                        \n3. \"Samacheer<\/p>\n

                                                                        Question 18.
                                                                        \nExplain the action of following reagent with ethane nitrile.<\/p>\n

                                                                          \n
                                                                        1. Dilute mineral acid<\/li>\n
                                                                        2. Ni \/ H2<\/sub><\/li>\n<\/ol>\n

                                                                          Answer:
                                                                          \n1. \"Samacheer
                                                                          \n2. \"Samacheer<\/p>\n

                                                                          Question 19.
                                                                          \nWhat happens when methyl isocyanide reacts with the following reagents?<\/p>\n

                                                                            \n
                                                                          1. Mineral acid<\/li>\n
                                                                          2. Na + C2<\/sub>H5<\/sub>OH<\/li>\n<\/ol>\n

                                                                            Answer:
                                                                            \n1. \"Samacheer
                                                                            \n2. \"Samacheer<\/p>\n

                                                                            Question 20.
                                                                            \nExplain the addition reactions of alkyl Isocyanide with<\/p>\n

                                                                              \n
                                                                            1. halogen<\/li>\n
                                                                            2. sulphur<\/li>\n
                                                                            3. ozone<\/li>\n<\/ol>\n

                                                                              Answer:
                                                                              \n1. \"Samacheer
                                                                              \n2. \"Samacheer
                                                                              \n3. \"Samacheer<\/p>\n

                                                                              Question 21.
                                                                              \nWhat are the uses of aliphatic nitro compounds.
                                                                              \nAnswer:<\/p>\n

                                                                                \n
                                                                              1. Nitromethane is used as a fuel for cars.<\/li>\n
                                                                              2. Chloropicrrn (CCI3<\/sub>NO2<\/sub>) is used as an insecticide<\/li>\n
                                                                              3. Nitroethane is used as a fuel additive and precursor to explosive and they are good solvents for polymers, cellulose ester, synthetic rubber and dyes etc,<\/li>\n<\/ol>\n

                                                                                Question 22.
                                                                                \nExplain about the structure and uses of Mitomycin.
                                                                                \nAnswer:<\/p>\n

                                                                                  \n
                                                                                1. Mitomycin C, and anticancer agent used to treat stomach and colon cancer, contains an aziridine ring.<\/li>\n
                                                                                2. The aziridine functional group participates in the drug\u2019s degradation by DNA, resulting in the death of cancerous cells.<\/li>\n
                                                                                3. \"Samacheer<\/li>\n<\/ol>\n

                                                                                  Question 23
                                                                                  \nComplete the following reactions.
                                                                                  \n\"Samacheer
                                                                                  \nAnswer:
                                                                                  \n\"Samacheer<\/p>\n

                                                                                  Question 24.
                                                                                  \nConvert Methanamine into Ethanamine.
                                                                                  \nAnswer:
                                                                                  \n\"Samacheer<\/p>\n

                                                                                  Question 25.
                                                                                  \nConvert Ethanamic into Methanamine.
                                                                                  \nAnswer:
                                                                                  \n\"Samacheer<\/p>\n

                                                                                  Question 26.
                                                                                  \nHow would you obtain Benzoic acid from aniline?
                                                                                  \nAnswer:
                                                                                  \n\"Samacheer<\/p>\n

                                                                                  Question 27.
                                                                                  \nComplete the following reactions.
                                                                                  \n\"Samacheer
                                                                                  \nAnswer:
                                                                                  \n\"Samacheer<\/p>\n

                                                                                  Question 28.
                                                                                  \nWrite the reactions of<\/p>\n

                                                                                    \n
                                                                                  1. aromatic and<\/li>\n
                                                                                  2. aliphatic primary amines with nitrous acid.<\/li>\n<\/ol>\n

                                                                                    Answer:
                                                                                    \nAromatic primary amines react with HNO2<\/sub> at 273 – 278 K to form aromatic diazonium salts.
                                                                                    \n\"Samacheer
                                                                                    \nAliphatic primary amines also react with HNO2<\/sub> at 273 – 278 K to form aliphatic diazonium salts. But these are unstable even at low temperature and thus decomposes readily to form a mixture of compounds consisting of alkyl chlorides, alkenes and alcohols, out of which alcohols generally predominates.
                                                                                    \n\"Samacheer<\/p>\n

                                                                                    Question 29
                                                                                    \nGiven plausible explanation for each of the following.<\/p>\n

                                                                                      \n
                                                                                    1. Why are amines less acidic than alcohols of comparable molecular masses?<\/li>\n
                                                                                    2. Why do primary amines have higher boiling point than tertiary amines?<\/li>\n
                                                                                    3. Why are aliphatic amines stronger bases than aromatic amines?<\/li>\n<\/ol>\n

                                                                                      Answer:
                                                                                      \n1. It is because C2<\/sub>H5<\/sub>O\u00b0 is more stable than C2<\/sub>H5<\/sub>NH\u00b0 because oxygen is more electronegative than nitrogen.<\/p>\n

                                                                                      2. Due to the presence of two H – atoms on N – atom of primary amines, they undergo extensive intennolecular H – bonding while tertiary amines due to the absence of a H – atoms on the N – atom do not undergo H – bonding. As a result, primary amines have higher boiling point than tertiary amines of comparable molecular masses.<\/p>\n

                                                                                      3. It is because there is electron withdrawing, C6<\/sub>H5<\/sub> group in aromatic amines which makes them less basic than aliphatic amines in which alkyl group is electron releasing.<\/p>\n

                                                                                      Question 30.
                                                                                      \nAccount for the following.<\/p>\n

                                                                                        \n
                                                                                      1. Primary amines (R – NH2<\/sub>)have higher boiling point than tertiary amines (R3<\/sub>N).<\/li>\n
                                                                                      2. Aniline does not undergo Friedel – Crafts reaction.<\/li>\n
                                                                                      3. (CH3<\/sub>)2<\/sub>NH Is more basic than (CH3<\/sub>)3<\/sub>N in an aqueous solution.<\/li>\n<\/ol>\n

                                                                                        Answer:
                                                                                        \n1. Due to maximum intermolecular hydrogen bonding in primary amines (due to presence of more number of H – atoms), primary amines have higher boiling point in comparison to tertiary amines.<\/p>\n

                                                                                        2. Aniline does not undergo Friedel-Crafts reaction due to acid-base reaction. Aniline and a Lewis Acid \/ Protic Acid, which is used in Friedel-crafts reaction.<\/p>\n

                                                                                        3. In (CH3<\/sub>)3<\/sub>N there is maximum steric hindrance and least solvation but in (CH3<\/sub>)2<\/sub>NH the solvation is more group; di-methyl amine is still a stronger base than trimethyl amine.<\/p>\n

                                                                                        Question 31.
                                                                                        \nWrite the structures of A,B and C in the following reactions.
                                                                                        \n\"Samacheer
                                                                                        \nAnswer:
                                                                                        \n\"Samacheer<\/p>\n

                                                                                        Question 32.
                                                                                        \nPredict, giving reasons the order of basicity of the following compounds.<\/p>\n

                                                                                          \n
                                                                                        1. gaseous phase<\/li>\n
                                                                                        2. In aqueous solution (CH3<\/sub>)3<\/sub>N, (CH3<\/sub>)2<\/sub>NH, CH3<\/sub>NH2<\/sub>, NH3<\/sub><\/li>\n<\/ol>\n

                                                                                          Answer:
                                                                                          \n1. In gaseous phase, basic character of amines increases with the increase in the number of electron the releasing alkyl groups due to + I effect so the trend of basic character is 3\u00b0 > 2\u00b0 > 1\u00b0 > NH3<\/sub>. Therefore, (CH3<\/sub>)3<\/sub>N > (CH3<\/sub>)3<\/sub>NH > CH3<\/sub>NH2<\/sub> > NH3<\/sub>.<\/p>\n

                                                                                          2. In aqueous phase, solvation of ammonium cation occurs by warer molecules, greater the size of ion, lesser will be the solvation and lesser will be the stability of ion. So on combining + I effect and solvation effect, in aqueous phase trend changes to 2\u00b0 > 1\u00b0 > 3\u00b0, (CH3<\/sub>)2<\/sub>NH > CH3<\/sub>NH2<\/sub> > (CH3<\/sub>)3<\/sub>N > NH3<\/sub>.<\/p>\n

                                                                                          Question 33.
                                                                                          \nIdentify A and B in the following reactions.
                                                                                          \n\"Samacheer
                                                                                          \nAnswer:
                                                                                          \n\"Samacheer<\/p>\n

                                                                                          Question 34.
                                                                                          \nWhat happens when. (Write reactions only)<\/p>\n

                                                                                            \n
                                                                                          1. Nitroethane is treated with LiAlH4<\/sub>.<\/li>\n
                                                                                          2. Diazonium chloride reacts with phenol in basic medium.<\/li>\n<\/ol>\n

                                                                                            Answer:
                                                                                            \n1. \"Samacheer
                                                                                            \n2. \"Samacheer<\/p>\n

                                                                                            Question 35.
                                                                                            \nHow would you achieve the following conversions.
                                                                                            \nAnswer:<\/p>\n

                                                                                            (i) Nitrobenzene to aniline<\/p>\n

                                                                                            (ii) An alkyl halide to a quarternary ammonium salt.<\/p>\n

                                                                                            (iii) Aniline to benzonitrile.<\/p>\n

                                                                                            Answer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 36.
                                                                                            \nWhat happens when (write reactions only).<\/p>\n

                                                                                            (i) Nitropropane is treated with LiAlH4<\/sub>.
                                                                                            \n(ii) Ethyl lsocya\u00f1ide undergoes hydrolysis.
                                                                                            \n(iii) Benzene diazonium chloride reacts with phenol i basic medium.<\/p>\n

                                                                                            Answer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 37.
                                                                                            \nIdentify A and B in the following reactions.
                                                                                            \n\"Samacheer
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 38.
                                                                                            \nIdentify A and B in the following reactions
                                                                                            \n\"Samacheer
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 39.
                                                                                            \nA compound \u2018x\u2019 having molecular formula C3<\/sub>H7<\/sub>NO reacts with Br2<\/sub> in the presence of KOH to give another compound \u2018y\u2019. The compound \u2018y\u2019 reacts with HNO2<\/sub> to form ethanol. and N2<\/sub> gas. Identify the compounds x andy and write the reactions involved.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 40.
                                                                                            \nAn organic compound \u2018A\u2019 having molecular formula C3<\/sub>H5<\/sub>N on hydrolysis gave a nother compound \u2018B\u2019 The compound \u2018B\u2019 on treatment with HNO2<\/sub> gave ethyl alcohol. \u2018B\u2019 on warming with CHCI3<\/sub> and alcoholic caustic potash gave an offensive smelling substance \u2018C\u2019. Identify \u2018A\u2019, \u2018B\u2019 and \u2018C\u2019.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Samacheer Kalvi 12th Chemistry 13 Organic Nitrogen Compounds 5 Mark Questions and Answers<\/strong><\/span><\/p>\n

                                                                                            Question 1.
                                                                                            \nExplain the various reduction reactions of nitrobenzene.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 2.
                                                                                            \nWhat happens when nitrous acid react with
                                                                                            \n(i) Ethyl amine
                                                                                            \n(ii) Aniline
                                                                                            \n(iii) N – methyl aniline
                                                                                            \n(iv) Trimethyl amine
                                                                                            \n(v) N, N – dimethyl aniline
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 3.
                                                                                            \nStarting from Benzene diazonium chloride, how would you prepare
                                                                                            \n(i) Benzene
                                                                                            \n(ii) Phenol
                                                                                            \n(iii) Nitro benzene
                                                                                            \n(iv) Benzolc acid
                                                                                            \n(v) Fluorobenzene
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 4.
                                                                                            \nStarting from Benzene diazonium chloride, how would you prepare
                                                                                            \n(i) Biphenyl
                                                                                            \n(ii) Phenyl hydrazine
                                                                                            \n(iii) p – hydroxy azo benzene
                                                                                            \n(iv) p – amino azo benzene
                                                                                            \n(v) Chioro benzene
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 5.
                                                                                            \nConvert aniline into the following compounds.
                                                                                            \n(i) N – phenyl benzamide
                                                                                            \n(ii) Phenyl isothiocyanate
                                                                                            \n(iii) 2, 4, 6 – tribromo aniline
                                                                                            \n(iv) Sulphanilinic acid
                                                                                            \n(v) Phenyl isocyanide
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 6.
                                                                                            \nAn organic compound (A) of molecular formula C6<\/sub>H7<\/sub>N on reaction with sodium nitrite and hydrochloric acid at 0\u00b0C gives (B) of formula C6<\/sub>H5<\/sub>N2<\/sub>Cl. (B) on treatment with cuprous cyanide give (C) of formula C7<\/sub>H5<\/sub>N. (C) on reaction with sodium and ethanol gives (D) of formula C7<\/sub>H9<\/sub>N. (D) on reaction with nitrous acid gives (E) of molecular formula C7<\/sub>H8<\/sub>O. Identify A, B, C, D and E and explain the reactions involved.
                                                                                            \nAnswer:
                                                                                            \n1. (A) is identified as Aniline from the molecular formula.
                                                                                            \n2. Aniline on reaction with sodium nitrite and hydrochloric acid at 0\u00b0C, diazotisation take place and the product (B) formed is benzene diazonium chloride.
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            3. Benzene diazonium chloride on treatment with CuCN produces (C) as cyano benzene.
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            4. Cyano benzene on reaction with Na and C2<\/sub>H5<\/sub>OH undergoes reduction reaction to give (D) as benzvlamine.
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            5. Benzylamine on treatment with nitrous acid gives benzyl alcohol as (E).
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 7.
                                                                                            \nComplete the following reactions and identify the A, B and C in these reaction.
                                                                                            \n\"Samacheer
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 8.
                                                                                            \nAn aromatic compound \u2018A\u2019 on treatment with aqueous ammonia and heating forms compound \u2018B\u2019 which on heating with Br2<\/sub> and KOH forms a compound \u2018C\u2019 of molecular formula C6<\/sub>H7<\/sub>N. Write the structures and IUPAC names of compound A, B and C.
                                                                                            \nAnswer:
                                                                                            \nStep – 1: To find out the structure of compounds \u2018B\u2019 and \u2018C\u2019.
                                                                                            \n1. Since compound \u2018C\u2019 with molecular formula C6<\/sub>H7<\/sub>N is formed from compound \u2018B\u2019 on treatment with Br2<\/sub> + KOH (i.e., Hoffmatm bromamide reaction). Therefore, compound \u2018B\u2019 must be an amide and \u2018C\u2019 must be an amine. The only amine having the molecular formula C6<\/sub>H7<\/sub>N is C6<\/sub>H5<\/sub>NH2<\/sub> (i.e., aniline or benzenamine).<\/p>\n

                                                                                            2. Since \u2018C\u2019 is aniline, therefore, the amide from which it is formed must be benzamide (C6<\/sub>H5<\/sub>CONH2<\/sub>). Thus, compound \u2018B\u2019 is benzamide. The chemical equation showing the conversion of \u2018B\u2019 to \u2018C\u2019 is
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Step – 2:
                                                                                            \nTo find out the structure of compound \u2018A\u2019. Since compound \u2018B\u2019 is formed from compound \u2018A\u2019 by treatment with aqueous ammonia and heating. Therefore, compound \u2018A\u2019 must be benzoic acid or benzenecarboxylic acid.
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 9.
                                                                                            \nAn aromatic compound \u2018A\u2019 of molecular formula C7<\/sub>H7<\/sub>ON undergoes a series of reactions as shown below. Write the structures of A,B,C, D and E in the following reactions.
                                                                                            \n\"Samacheer
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 10.
                                                                                            \nWrite reactions and conditions required for the following conversions.
                                                                                            \n(i) Aniline to benzene
                                                                                            \n(ii) Methylamine to methylcyanide
                                                                                            \n(iii) Propanenitrile to ethylamine
                                                                                            \n(iv) m – Bromoaniline to m – bromophenol
                                                                                            \n(v) Nitrobenzene to 2, 4, 6 – tribromoaniline.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 11.
                                                                                            \nA compound \u2018A\u2019 of molecular formula C3<\/sub>H7<\/sub>O2<\/sub>N on reaction with Fe and cone. HCI gives a compound \u2018B\u2019 of molecular formula C3<\/sub>H9<\/sub>N. Compound \u2018B\u2019 on treatment with NaNO2<\/sub> and HCI gives another compound \u2018C\u2019 of molecular formula C3<\/sub>H8<\/sub>O. The compound \u2018C\u2019 has molecular formula, C3<\/sub>H8<\/sub>O. The compound \u2018C\u2019 gives effervescence with Na. On oxidation with CrO3<\/sub>, the compound \u2018C\u2019 gives a saturated aldehyde containing three carbon atoms. Deduce the structures of A, B and C and write the equations for the reaction involved.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 12.
                                                                                            \nIdentify compounds A, B and C in the following reactions.
                                                                                            \n\"Samacheer
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 13.
                                                                                            \nA aromatic hydrocarbon (A) of molecular formula C6<\/sub>H6<\/sub> reacts with Conc.HNO3<\/sub> and Conc. H2<\/sub>SO4<\/sub> gives (B) of formula C6<\/sub>H5<\/sub>O2<\/sub>N. (B) on reaction with Sn\/HCI gives (C) of formula C6<\/sub>H7<\/sub>N which answers carbylamine reaction. (C) on treatment with chloroform and alkali gives (D) of formula C7<\/sub>H5<\/sub>N. Identify A, B, C, D and explain the reactions involved.
                                                                                            \nAnswer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Question 14.
                                                                                            \nConvert the following.
                                                                                            \n(i) Nitro benzene \u2192 Benzene
                                                                                            \n(ii) Benzene \u2192 Benzoic acid<\/p>\n

                                                                                            Answer:
                                                                                            \n\"Samacheer<\/p>\n

                                                                                            Common Errors<\/p>\n

                                                                                              \n
                                                                                            1. TUPAC name of nitro compounds.<\/li>\n
                                                                                            2. If the formula ends as – NO2<\/sub>, the students always think of nitro only.<\/li>\n
                                                                                            3. Reducing agents may be different for different medium.<\/li>\n
                                                                                            4. Basic character of amines is always difficult to remember.<\/li>\n
                                                                                            5. Cyanide and isocyanide formula may get confusing.<\/li>\n<\/ol>\n

                                                                                              Rectifications<\/p>\n

                                                                                              1. Both common name and IUPAC names are same for aliphatic and aromatic nitro compounds.<\/p>\n

                                                                                              2. – NO2<\/sub> may be
                                                                                              \n\"Samacheer<\/p>\n

                                                                                              3.<\/p>\n

                                                                                                \n
                                                                                              • Acid medium reducing agent: Sn \/ HCI<\/li>\n
                                                                                              • Neutral medium reducing agent: Zn + NH4<\/sub>CI<\/li>\n
                                                                                              • Basic medium reducing agent: Zn \/ NaOH<\/li>\n
                                                                                              • Catalytic reducing agent: Ni, Pt, LiAlH4<\/sub><\/li>\n<\/ul>\n

                                                                                                4. 2\u00b0 amine > 3\u00b0 amine > 1\u00b0 amine > NH3<\/sub>
                                                                                                \n\"Samacheer
                                                                                                \nAlkyl group is connected to \"Samacheer C – Cyanide. If alkyl group connected to \"Samacheer\u00a0Isocyandie.<\/p>\n

                                                                                                Hope you love the Samacheer Kalvi 12th Chemistry Chapter Wise Material. Clearly understand the deep concept of Chemistry learning with the help of Tamilnadu State Board 12th Chemistry Chapter 13 Organic Nitrogen Compounds Questions and AnswersPDF. Refer your friends to and bookmark our website for instant updates. Also, keep in touch with us using the comment section.<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                                                                Are you searching for the Samacheer Kalvi 12th Chemistry Chapter Wise Solutions PDF? Then, get your Samacheer Kalvi 12th Chapter Wise Solutions PDF for free on our website. Students can Download Chemistry Chapter 13 Organic Nitrogen Compounds Questions and Answers, Notes Pdf, Samacheer Kalvi 12th Chemistry Solutions Guide Pdf helps you to revise the complete …<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[8],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts\/14242"}],"collection":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/comments?post=14242"}],"version-history":[{"count":1,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts\/14242\/revisions"}],"predecessor-version":[{"id":60965,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts\/14242\/revisions\/60965"}],"wp:attachment":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/media?parent=14242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/categories?post=14242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/tags?post=14242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}