Question

Benzene diazonium chloride on reaction with aniline in mild alkaline medium forms

• A. Diphenyl ether
• B. p-Aminoazobenzene
• C. Chlorobenzene
• D. Benzene

Answer 1

Answer: (B)

p‑Aminoazobenzene

Answer 2

The benzene diazonium chloride reacts with aniline in an electrophilic aromatic substitution (azo coupling) reaction. In this process, the free –NH₂ group of aniline activates the ring (especially the para-position) for attack by the diazonium ion. Under mild alkaline conditions the aniline remains unprotonated (and thus nucleophilic), favoring coupling at the para position. The product formed is therefore p‑aminoazobenzene.