An organic compound $A$ containing nitrogen, on acid catalysed hydrolysis produces a water-soluble organic compound $B$ and a gaseous compound $C$ . When methyl magnesium bromide is slowly added to $A$ in 1 : 1 ratio and hydrolysed, it produces a compound which can be obtained by dry distillation of the calcium salt of $B$ . The compound $A$ is:

N-methylmethanmide

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N-ethylmethanamide

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acetonitrile

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N, N-dimethylmethanamide

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methylisocyanide

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Solution

The correct option is B acetonitrile
Acetonitraile( $C H_{3} - C \equiv N$ ) on acid catalyzed hydrolysis produces acetic acid which is water soluble organic compound and a gaseous compound NH $_{3}$ .
When methyl magnesium bromide is slowly added to A in 1:1 ratio of hydrolysed, it produces a compound acetaldehyde which can be obtained from dry distillation of calcium salt of acetic acid i.e. calcium acetate.

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