Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Amines

Question:

Identify the correct statements from the given below:

(A) Alcohols are less basic than amines.
(B) Aromatic primary amines can be prepared by Gabriel phthalimide synthesis.
(C) Primary amines have higher boiling points than tertiary amines.
(D) Carbylamine test can be used as a test for both primary aliphatic and aromatic amines

Choose the correct answer from the options given below:

Options:

(A), (C) and (D) only

(A), (B) and (C) only

(A), (B), (C) and (D)

(B), (C) and (D) only

Correct Answer:

(A), (C) and (D) only

Explanation:

The correct answer is Option (1) → (A), (C) and (D) only

1. Alcohols are less basic than amines -
Amines have a lone pair on nitrogen which is more available for protonation compared to oxygen in alcohols so amines are more basic.

2. Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis –
Gabriel synthesis cannot prepare aromatic amines (like aniline) because aryl halides do not undergo nucleophilic substitution easily.

3.Primary amines have higher boiling points than tertiary amines as Primary amines form strong hydrogen bonds, whereas tertiary amines cannot form intermolecular hydrogen bonds 

4.Carbylamine test can be used for both primary aliphatic and aromatic amines as Carbylamine test is positive for all primary amines (both aliphatic and aromatic).