# 13.9     Give the structures of A, B and C in the following reactions:                (vi) $\inline C_{6}H_{5}NO_{2}\xrightarrow[]{Fe/HCl}A\xrightarrow[273K]{HNO_{2}}B\xrightarrow[]{C_{6}H_{5}OH}C$

Initially, product A is the reduction of nitrobenzene means it is an aniline. when A react with $HNO_{2}$ 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)