Question
Which from following amines does NOT form alkyl isocyanide when heated with alc. KOH and chloroform
MHT CET
Chemistry
Amines
2026
MHT CET 2026 (18 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Methanamine
- B. Propan-2-amine
- C. N, N-Diethylethanamine
- D. Ethanamine
Answer
C. N, N-Diethylethanamine
Step-by-step solution
The reaction of an amine with chloroform and alcoholic KOH to form an alkyl isocyanide is known as the carbylamine reaction. This test is given only by primary (aliphatic and aromatic) amines. Secondary and tertiary amines do not respond to this test. Methanamine, propan-2-amine, and ethanamine are primary amines, so they will form alkyl isocyanides. N, N-Diethylethanamine is a tertiary amine, hence it does not undergo the carbylamine reaction and will not form an alkyl isocyanide. Answer: N, N-Diethylethanamine
Related: Chemistry — Amines · All PYQ Banks