question_answer

Benzamide can be converted into benzonitrile with

A) \[{{H}_{3}}{{O}^{+}}\]        

B) \[O{{H}^{-}}/{{H}_{2}}O\]

C)  KCN         

D) \[{{P}_{2}}{{O}_{5}}\]

Correct Answer: D

Solution :

 With \[{{\text{P}}_{\text{2}}}{{\text{O}}_{\text{5}}}\text{,}\]benzamide loses a water molecule  and gives benzonitrile. Here, \[{{\text{P}}_{\text{2}}}{{\text{O}}_{\text{5}}}\]is a dehydrating agent.