Question

Which on reduction does not give primary amines?

• A. $C_2{H}_{3}NC$
• B. $C{H}_{3}CN$
• C. $C{H}_{3}CON{H}_2$
• D. All of these

Answer 1

Answer: (A)

Isocyanides (carbylamines) on reduction give $2^{\circ }$ amines.
$R-NC\stackrel{H_2/Ni}{⟶}\underset{2^{\circ }\text{amine}}{R-NHC{H}_3}$