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Amines · Question 15

NEET (UG) 2022MCQEasy📈 Topic in 12% papers+4−1
1

Given below are two statements In the light of the above statements, choose the most appropriate answer from the options given below.

  1. Both Statement I and Statement II are correct.
  2. Both Statement I and Statement II are incorrect.
  3. Statement I is correct but Statement II is incorrect.
  4. Statement I is incorrect but Statement II is correct.

Answer

(3) Statement I is correct but Statement II is incorrect.

Solution

Statement I: As per NCERT, primary aliphatic amines react with nitrous acid to form highly unstable aliphatic diazonium salts, which decompose at once to give alcohol and nitrogen gas:

RNH2 + HNO2 NaNO2 + HCl [R-N2+Cl-] H2O ROH + N2 + HCl. Correct.

Statement II: Primary aromatic amines give arenediazonium salts, which are stable only for a short time in solution at low temperature (273–278 K); they are not stable above 300 K. Incorrect.

Answer: (3)

NEET (UG) 2022

Keep practising — Amines

2

The product formed from the following reaction sequence is [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2022
3

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2022 (Phase 2)
4

Match List-I with List-II : Choose the correct answer from the options given below :

  1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  2. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
  3. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
  4. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
NEET (UG) 2022 (Phase 2)
5

Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2021
6

The reagent 'R' in the given sequence of chemical reaction is : [figure]

  1. CuCN/KCN
  2. H2O
  3. CH3CH2OH
  4. HI
NEET (UG) 2021
7

Which of the following amine will give the carbylamine test?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2020
8

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

  1. (CH3)3N > (CH3)2NH > CH3NH2
  2. CH3NH2 > (CH3)2NH > (CH3)3N
  3. (CH3)2NH > CH3NH2 > (CH3)3N
  4. (CH3)3N > CH3NH2 > (CH3)2NH
NEET (UG) 2019
9

Nitration of aniline in strong acidic medium also gives m-nitroaniline because

  1. in spite of substituents nitro group always goes to only m-position
  2. in electrophilic substitution reactions amino group is meta directive
  3. in absence of substituents nitro group always goes to m-position
  4. in acidic (strong) medium aniline is present as anilinium ion
NEET 2018
10

The correct increasing order of basic strength for the following compounds is [figure]

  1. III < I < II
  2. III < II < I
  3. II < I < III
  4. II < III < I
NEET 2017
11

Which of the following reactions is appropriate for converting acetamide to methanamine?

  1. Hoffmann hypobromamide reaction
  2. Stephen's reaction
  3. Gabriel phthalimide synthesis
  4. Carbylamine reaction
NEET 2017

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