A) R ? N = C = O
B) \[R-\overset{+}{\mathop{N}}\,\equiv {{C}^{-}}\]
C) \[R-C\equiv N\]
D) None of these.
Correct Answer: B
Solution :
N-alkyl form amides when dehydrated with POCl3 in presence of pyridine give isocyanides.
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