Chemistry - AMINES Question with Solution | TestHub

Question Explanation: The question asks to identify the reactions that produce primary $\left(1^{\circ }\right)$ amines.

Concept: This problem is based on standard methods of preparation of primary amines , mainly:

Hofmann bromamide reaction

Reduction of amides

Gabriel phthalimide synthesis

Primary amines obtained from these reactions give a positive carbylamine (isocyanide) test .

Solution: Option (1): Hofmann Bromamide Reaction  

Converts an amide into a primary amine with one carbon less .

Option (2): Reduction of Amide with LiAlH₄  

Amide is reduced to a primary amine .

Option (3): Gabriel Phthalimide Synthesis  

A selective method for the preparation of primary amines only .

Product of all three reactions will give isocyanides test.

Final Answer: Option (D)