A) alkyl chloride
B) alkyl alcohol
C) alkyl isocyanide
D) alkene
Correct Answer: C
Solution :
Both aliphatic and aromatic primary amines when warmed with chloroform and alcoholic KOH produce isocyanides or carbylamines which have very unpleasant odours. \[\underset{1{}^\circ \,\,\text{amine}}{\mathop{R-N{{H}_{2}}}}\,+CHC{{l}_{3}}+3KOH(alc.)\xrightarrow{\Delta }\] \[\underset{\begin{smallmatrix} \text{alkyl}\,\,\text{isocyanide} \\ \text{or}\,\,\text{alkyl}\,\,\text{carbylamine} \end{smallmatrix}}{\mathop{R-N\overset{\to }{\mathop{=}}\,\,\,C}}\,+3KCl+3{{H}_{3}}O\] This test is used to distinguish primary amines from secondary and tertiary amines.
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