Question

In the chemical reaction, the compounds $A$ and $B$ respectively are:

• A. Benzene diazonium chloride and benzonitrile
• B. Nitrobenzene and chlorobenzene
• C. Phenol and bromobenzene
• D. Flurobenzene and phenol

Answer 1

The correct option is A Benzene diazonium chloride and benzonitrile

In this reaction, aniline is diazotized to obtain benzene diazonium chloride (compound $A$)

The diazonium group of benzene diazonium chloride is then replaced with cyano group by Sandmeyer reaction.

Thus, the compounds $A$ and $B$ respectively are benzene diazonium chloride and benzonitrile.

Option A is correct.