13. AMINES (HM)
Explanation:
(a)\(\mathop {R - C{H_2} - N{O_2}}\limits_{{1^o}{\text{nitro}}} {\mkern 1mu} \xrightarrow{{HN{O_2}}}\) $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_2}} \\
{||\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,N - OH}
\end{array}}\limits_{{\text{Nitroloic acid}}} {\mkern 1mu} $ $\xrightarrow{{NaOH}}$ $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_{2\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,N - {O^ - }N{a^ + }}
\end{array}}\limits_{{\text{(Blood red)}}} {\mkern 1mu} $
