The conversion of $A$ to $B$ is an example of which reaction?
$\text{Propanenitrile}$ $\xrightarrow{LiAlH_4} A$ $\xrightarrow{CHCl_3 / \text{alcoholic } KOH, \Delta} B$

Account for the following:
$(i)$ $pK_{b}$ of aniline is more than that of methylamine.
$(ii)$ Ethylamine is soluble in water whereas aniline is not.
$(iii)$ Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
$(iv)$ Although amino group is $o-$ and $p-$ directing in aromatic electrophilic substitution reactions,aniline on nitration gives a substantial amount of $m$-nitroaniline.
$(v)$ Aniline does not undergo Friedel-Crafts reaction.
$(vi)$ Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
$(vii)$ Gabriel phthalimide synthesis is preferred for synthesising primary amines.

The major product in the following reaction sequence is:

Identify $Y$ in the following reaction sequence:
$C_6H_5NH_2$ $\xrightarrow[5^{\circ}C]{NaNO_2 + HCl} X$ $\xrightarrow{H_3PO_2 / H_2O} Y$

Aniline $\xrightarrow[{{0^{\circ}}C - {5^{\circ}}C}]{{NaNO_2/HCl}}A$ $\xrightarrow{{Ph-N(CH_3)_2}}B$
What is $B$?

$Methylamine$ on treatment with $chloroform$ $(CHCl_3)$ and ethanolic caustic alkali $(KOH)$ gives a foul-smelling compound. The compound is: