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Amines

RE-NEET (UG) 2024MCQEasy📈 Topic in 62% papers+4−1
Ques. 1RE-NEET (UG) 2024

The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is :

  1. Aniline
  2. Pyridine
  3. N-methylaniline
  4. Triethylamine

Answer

(1) Aniline

Solution

Carbylamine test is given only by primary amines: RNH2 + CHCl3 + 3KOH RNC + 3KCl + 3H2O.

Aniline is a primary aromatic amine, so it gives the test. It does not undergo Friedel-Crafts reaction because the basic -NH2 group forms a salt with the Lewis acid AlCl3; the N acquires a positive charge, which strongly deactivates the ring.

Pyridine and triethylamine (3°) and N-methylaniline (2°) do not give the carbylamine test.

Answer: (1)

Keep practising — Amines

Ques. 2NEET (UG) 2023

Identify the product in the following reaction: [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 3NEET (UG) 2023

Which of the following reactions will NOT give primary amine as the product?

  1. CH3CN [ (ii) H3O ](i) LiAlH4 Product
  2. CH3NC [ (ii) H3O ](i) LiAlH4 Product
  3. CH3CONH2 [ (ii) H3O ](i) LiAlH4 Product
  4. CH3CONH2 Br2/KOH Product
Ques. 4NEET (UG) 2022

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.
Ques. 5NEET (UG) 2022

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6NEET (UG) 2022 (Phase 2)

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 7NEET (UG) 2022 (Phase 2)

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)
Ques. 8NEET (UG) 2021

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]
Ques. 9NEET (UG) 2021

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

  1. CuCN/KCN
  2. H2O
  3. CH3CH2OH
  4. HI
Ques. 10NEET (UG) 2020

Which of the following amine will give the carbylamine test?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11NEET (UG) 2019

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

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