
${C_6}{H_5}N{H_2}\mathop {\xrightarrow{{NaN{O_2}/HCl}}}\limits_{0 - 5\,^o C} X\mathop {\xrightarrow{{HN{O_2}}}}\limits_{C{H_2}O} Y + {N_2} + HCl$
$X$ and $Y$ are respectively
$[Image]$
$(A)$ $o-$Nitroaniline and $p-$nitroaniline are the predominant products
$(B)$ $p-$Nitroaniline and $m-$nitroaniline are the predominant products
$(C)$ $HNO _{3}$ acts as an acid
$(D)$ $H _{2} SO _{4}$ acts as an acid

$ArN _{2} Cl \overset{Cu / HCl}{\rightarrow} ArCl + N _{2}$ is known as
$X\xrightarrow{{{\text{Bromination}}}}Y\xrightarrow{{NaN{O_2} + HCl}}Z\mathop {\xrightarrow{{{\text{Boiling}}}}}\limits_{{C_2}{H_5}OH} {\text{Tribromobenzene}}$