Question

Identify correct statements: 
(A) Primary amines do not give diazonium salts when treated with \({NaNO}_2\) in acidic condition. 
(B) Aliphatic and aromatic primary amines on heating with \({CHCl}_3\) and ethanolic \({KOH}\) form carbylamines. 
(C) Secondary and tertiary amines also give carbylamine test. 
(D) Benzenesulfonyl chloride is known as Hinsberg’s reagent. 
(E) Tertiary amines react with benzenesulfonyl chloride very easily. 
Choose the correct answer from the options given below:

• (D) and (E) only
• (B) and (D) only
• (A) and (B) only
• (B) and (C) only

Hint:

- The carbylamine test is specific for primary amines. - Hinsberg’s test differentiates primary, secondary, and tertiary amines based on their reaction with benzenesulfonyl chloride.

Answer 1

The Correct Option is B

- Statement (A) is incorrect: Primary amines do yield diazonium salts upon reaction with \({NaNO}_2\) in acidic media, a characteristic reaction for primary aromatic amines.
- Statement (B) is correct: The carbylamine test is specific to primary amines; reaction with chloroform (\({CHCl}_3\)) and ethanolic \({KOH}\) produces foul-smelling isocyanides (carbylamines).
- Statement (C) is incorrect: Only primary amines exhibit the carbylamine test; secondary and tertiary amines do not react.
- Statement (D) is correct: Benzenesulfonyl chloride, also known as Hinsberg’s reagent, is employed to differentiate between primary, secondary, and tertiary amines.
- Statement (E) is incorrect: Tertiary amines do not react with Hinsberg’s reagent under standard conditions.