13.9 Give the structures of A, B and C in the following reactions:
(vi)
Initially, product A is the reduction of nitrobenzene means it is an aniline. when A react with it gives benzene diazonium chloride(B). And when B reacts with another aromatic ring (phenol) it's a coupling reaction so it gives azodye (p-Hydroxyazobenzene)
A= Aniline B = benzene diazonium chloride C= p-Hydroxyazobenzene