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 give diazonium salts when treated with \({NaNO}_2\) in acidic conditions. This is a standard test for primary aromatic amines. 
- Statement (B) is correct: The carbylamine test is a characteristic test for primary amines, where they react with chloroform (\({CHCl}_3\)) and ethanolic \({KOH}\) to form isocyanides (carbylamines) with a foul smell. 
- Statement (C) is incorrect: Only primary amines give the carbylamine test. 
Secondary and tertiary amines do not. 
- Statement (D) is correct: Benzenesulfonyl chloride is known as Hinsberg’s reagent, which is used to distinguish primary, secondary, and tertiary amines. 
- Statement (E) is incorrect: Tertiary amines do not react with Hinsberg’s reagent under normal conditions.