Phenyl isocyanide is prepared by which of the following reactions?

If $279 \ g$ of aniline is reacted with one equivalent of benzenediazonium chloride,the maximum amount of aniline yellow formed will be $.........$ $g$. (nearest integer)
(consider complete conversion)

Identify $Z$ in the above sequence of reactions.

$R-CONH_2 \xrightarrow[{(2)H_3O^{+}}]{{(1)LiAlH_4}} P$ (Major),$P$ should be:

When aniline is nitrated with nitrating mixture in ice-cold condition,the major product obtained is

Identify $A$ and $B$ in the following reactions: