A) silver cyanide
B) potassium cyanide
C) hydrogen cyanide
D) ammonia
Correct Answer: B
Solution :
\[C{{H}_{3}}I+KCN\xrightarrow{{}}\underset{acetonitrile}{\mathop{C{{H}_{3}}CN}}\,+KI\] Note \[C{{H}_{3}}I+AgCN\xrightarrow{{}}\underset{\begin{smallmatrix} methyl \\ isocyanide \end{smallmatrix}}{\mathop{C{{H}_{3}}NC}}\,+AgI\]
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