Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

Benzamide on treatment with$\text{POC}{\text{l}}_3$gives benzonitrile (phenyl cyanide) because in this reaction$\text{POC}{\text{l}}_3$acts as a dehydrating agent and on dehydration of benzamide, benzonitrile is formed.

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}\mathrm{O}\mathrm{N}{\mathrm{H}}_2\stackrel{\mathrm{\Delta }\mathrm{P}\mathrm{O}\mathrm{C}{\mathrm{l}}_3}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}\mathrm{N}+{\mathrm{H}}_2\mathrm{O}$