Question

Carbylamine test is performed in alcoholic KOH by heating a mixture of

• A. chloroform and silver powder
• B. trihalogenated methane and a primary amine
• C. an alkyl halide and a primary amine
• D. an alkyl cyanide and a primary amine

Hint:

Secondary and tertiary amines do not give this test, making it useful for distinguishing primary amines.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Carbylamine reaction is a specific test for primary amines.
Step 2: Detailed Explanation:
In the carbylamine test, a primary amine is heated with chloroform (trihalogenated methane) and alcoholic KOH. The reaction produces an isocyanide (carbylamine) which has a foul smell. \[ R-NH_2 + CHCl_3 + 3KOH \rightarrow R-NC + 3KCl + 3H_2O \]
Step 3: Final Answer:
The mixture is trihalogenated methane and a primary amine, option (B).