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Amines

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

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)

Keep practising — Amines

Ques. 2AIPMT 2010 (Prelims)

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]
Ques. 3AIPMT 2009

Predict the product. [figure]

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

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]
Ques. 5AIPMT 2007

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
Ques. 6AIPMT 2006

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
Ques. 7AIPMT 2006

Which of the following is more basic than aniline?

  1. Benzylamine
  2. Diphenylamine
  3. Triphenylamine
  4. p-Nitroaniline
Ques. 8AIPMT 2005

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

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

Electrolytic reduction of nitrobenzene in weakly acidic medium gives

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

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
Ques. 11AIPMT 2004

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]

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