Question

Which from following amines when heated with ethanolic KOH and chloroform forms aryl isocyanide ?

• A. Benzenamine
• B. N -methylaniline
• C. N, N - Dimethylaniline
• D. Ethylethanamine

Hint:

Only primary amines give the carbylamine reaction.

Answer 1

The Correct Option is A

Step 1: Key requirement:
The nitrogen must carry two hydrogens, since both are lost in forming $\text{-N}\equiv\text{C}$.

Step 2: Apply:
Only aniline has $\text{-NH}_2$; the rest have one or no N-H. Answer (A).

Final Answer:
Benzenamine. \[ \boxed{\text{(A)}} \]