How many of the following compounds will give foul smell with $CHCl_{3}$ and alcoholic KOH ?
(i) Acetamide
(ii) Succinamide
(iii) Trimethylamine
(iv) Phthalamide
(v) N-Methylaniline
(vi) Phthalimide
(vii) Benzamide
(viii) Aniline

Question

How many of the following compounds will give foul smell with $CHCl_{3}$ and alcoholic KOH ?

(i) Acetamide

(ii) Succinamide

(iii) Trimethylamine

(iv) Phthalamide

(v) N-Methylaniline

(vi) Phthalimide

(vii) Benzamide

(viii) Aniline

TestHub · Accepted Answer

The reaction described is the Carbylamine reaction (Isocyanide test), which is specific for primary amines. Primary amines react with chloroform ( $C H C l_{3}$ ) and alcoholic KOH to form isocyanides, which have a characteristic foul smell.

Let's analyze each compound:

(i) Acetamide ( $C H_{3} CON H_{2}$ ): This is a primary amide, not a primary amine. It will not give the test.

(ii) Succinamide ( $H_{2} NOC (C H_{2})_{2} CON H_{2}$ ): This is a primary amide. It will not give the test.

(iii) Trimethylamine ( $(C H_{3})_{3} N$ ): This is a tertiary amine. It will not give the test.

(iv) Phthalamide ( $C_{6} H_{4} (CON H_{2})_{2}$ ): This is a primary amide. It will not give the test.

(v) N-Methylaniline ( $C_{6} H_{5} N H C H_{3}$ ): This is a secondary amine. It will not give the test.

(vi) Phthalimide ( $C_{6} H_{4} (CO)_{2} N H$ ): This is an imide, not a primary amine. It will not give the test.

(vii) Benzamide ( $C_{6} H_{5} CON H_{2}$ ): This is a primary amide. It will not give the test.

(viii) Aniline ( $C_{6} H_{5} N H_{2}$ ): This is a primary aromatic amine. It will give the Carbylamine reaction.

Only Aniline (viii) will give the foul smell.

The final answer is $1$

Chemistry - AMINES Question with Solution | TestHub

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