The electrolytic reduction of nitrobenzene in a strongly acidic medium produces:

The major product of the reaction is:

What are $X$ and $Y$ in the following reactions?

Consider the following reaction sequence. The final product $D$ will be:
$C_6H_5CH_3$ $\xrightarrow[\Delta]{KMnO_4/H^+} A$ $\xrightarrow{SOCl_2} B$ $\xrightarrow[\Delta]{NH_3} C$ $\xrightarrow{KOH/Br_2} D$

Which one of the following is the most basic compound?

Which of the following reaction/s will not give $p-$aminoazobenzene?