The product obtained by the electrolytic reduction of nitrobenzene in the presence of $H_2SO_4$ is:

Compound $A$ is converted to $B$ on reaction with $CHCl_3$ and $KOH$. The compound $B$ is toxic and can be decomposed by $C$. $A, B$ and $C$ respectively are:

Which of the following compounds reacts with aqueous nitrous acid at low temperature to give an oily substance,$N$-nitrosoamine?

What is the end product of the following reaction sequence?
$CH_3CH_2NH_2$ $\xrightarrow[H^+]{KMnO_4}$ $\xrightarrow{SOCl_2}$ $\xrightarrow[\Delta]{NH_3}$ $\xrightarrow{NaOH/Br_2} ?$

For reaction-$I$,the reagents are $CH_3CONH_2, KOH, Br_2$. For reaction-$II$,the reagents are $CH_3NH_2, CHCl_3, KOH$. What are the intermediates for reaction-$I$ and reaction-$II$ respectively?

In the reaction $C_6H_5NH_2 + CHCl_3 + 3KOH \rightarrow A + 3KCl + 3H_2O$,what is '$A$'?