Q45 / 150 · MHT CET 2026 (11 April Shift 1) · Chemistry
Which of following amines exhibits carbylamine test?
- ATertiary amine
- BSecondary amine
- Correct answerCPrimary amine
- DBoth Secondary and Tertiary amine
Solution
The carbylamine test is a characteristic test for primary amines.
When a primary amine is heated with chloroform and alcoholic potassium hydroxide, it forms an isocyanide (carbylamine) which has a characteristic foul smell.
The reaction is given by:
$R-NH_2 + CHCl_3 + 3KOH \rightarrow R-NC + 3KCl + 3H_2O$
Secondary and tertiary amines do not give this test.
Answer: Primary amine
When a primary amine is heated with chloroform and alcoholic potassium hydroxide, it forms an isocyanide (carbylamine) which has a characteristic foul smell.
The reaction is given by:
$R-NH_2 + CHCl_3 + 3KOH \rightarrow R-NC + 3KCl + 3H_2O$
Secondary and tertiary amines do not give this test.
Answer: Primary amine
Hence, the correct answer is option: 'C'.