(image) $\mathop {\xrightarrow{{CHC{l_3}/KOH}}}\limits_{heat} $ Intermediate $\mathop {\xrightarrow{{HCl}}}\limits_{300\,K} $ $X$
$ArN _{2} Cl \overset{Cu / HCl}{\rightarrow} ArCl + N _{2}$ is known as