JEE Main 2025 Jan 28 Shift 2, Chemistry Q18: Properties of Amines

JEE Main2025Jan 28, Shift 2Chemistry

Identify correct statements :

(A) Primary amines do not give diazonium salts when treated with $N a N O_{2}$ in acidc condition.

(B) Aliphatic and aromatic primary amines on heating wth $C H C l_{3}$ and ethanolic KOH form carbylamines.

(D) Benzenesulfonyl chloride is known as Hinsberg's reagent.

(E) Tertiary amines reacts with benzenesulfonyl chloride very easily.

Choose the correct answer from the options given below :

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

Solution

(A) Primary amines do react with $N a N O_{2} / H C l$ to give diazonium salts (stable for aromatic, unstable for aliphatic). The statement is incorrect.

(B) Both aliphatic and aromatic primary amines, when warmed with $C H C l_{3}$ and ethanolic KOH, give the foul-smelling isocyanide ( $R - N C$ ). This is the carbylamine test. Correct.

(D) Benzenesulfonyl chloride, $P h - S O_{2} C l$ , is indeed Hinsberg's reagent. Correct.

(E) Tertiary amines have no $N - H$ bond, so they do not react with $P h - S O_{2} C l$ to form a sulfonamide. Incorrect.

$∴$ Only (B) and (D) are correct.

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JEE Main 2025 Jan 28 Shift 2, Chemistry Q18: Properties of Amines

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