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Amines · Question 44

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 62% papers+4−1
1

Which of the following statements about primary amines is false?

  1. Alkyl amines are stronger bases than aryl amines.
  2. Alkyl amines react with nitrous acid to produce alcohols.
  3. Aryl amines react with nitrous acid to produce phenols.
  4. Alkyl amines are stronger bases than ammonia.

Answer

(3) Aryl amines react with nitrous acid to produce phenols.

Solution

(1) True: in aryl amines the lone pair on N is delocalised into the ring.

(2) True: RNH2 + HNO2 [RN2+Cl-] H2O ROH + N2 + HCl

(3) False: as per NCERT, aromatic amines react with nitrous acid at 273–278 K to form arenediazonium salts, not phenols.

(4) True: alkyl groups release electrons (+I effect), increasing the electron density on N.

Answer: (3)

AIPMT 2010 (Prelims)

Keep practising — Amines

2

Aniline in a set of the following reactions yielded a coloured product Y. [figure] The structure of 'Y' would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Prelims)
3

Predict the product. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2009
4

In a reaction of aniline a coloured product C was obtained. [figure] The structure of C would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2008
5

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

  1. Methyl isocyanide
  2. Acetamide
  3. Methyl cyanide
  4. Nitroethane
AIPMT 2007
6

In a set of reactions propionic acid yielded a compound D. CH3CH2COOH SOCl2 B NH3 C [Br2]KOH D The structure of D would be

  1. CH3CH2NH2
  2. CH3CH2CH2NH2
  3. CH3CH2CONH2
  4. CH3CH2NHCH3
AIPMT 2006
7

Which of the following is more basic than aniline?

  1. Benzylamine
  2. Diphenylamine
  3. Triphenylamine
  4. p-Nitroaniline
AIPMT 2006
8

The major organic product formed from the following reaction : [figure] is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2005
9

Electrolytic reduction of nitrobenzene in weakly acidic medium gives

  1. N-phenylhydroxylamine
  2. nitrosobenzene
  3. aniline
  4. p-hydroxyaniline
AIPMT 2005
10

Aniline in a set of reactions yielded a product D. [figure] The structure of the product D would be

  1. C6H5NHOH
  2. C6H5NHCH2CH3
  3. C6H5CH2NH2
  4. C6H5CH2OH
AIPMT 2005
11

In a reaction of aniline a coloured product C was obtained. [figure] The structure of C would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2004

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