13. AMINES (HM)
Explanation:
\({(R)_2}CH - N{O_2}\xrightarrow{{HN{O_2}}}\) \({(R)_2}\mathop {\mathop C\limits_| {\mkern 1mu} - N{O_2}}\limits_{N = O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\kern 1pt} {\kern 1pt} {\kern 1pt} } {\mkern 1mu} \xrightarrow{{NaOH}}\) नीला रंग