Phenyl isocyanide is prepared by which of the following reactions?

Identify compound $X$ in the following reaction.

$A$ primary amine can be converted to an alcohol by the action of

Which of the following is most basic?

For the given compounds:
$I$: Pyridine
$II$: Pyrrole
$III$: $3$-Pyrroline
$IV$: Guanidine
The correct statement is:

Consider the following sequence of reactions. The percentage of nitrogen in the yellow product $(X)$ formed is . . . . . . %. (Nearest Integer) (Given Molar mass in g mol$^{-1}$ $H$:$1$, $C$:$12$, $N$:$14$)