Which of the following compounds reacts with $HNO_2$ to form an alcohol?

The products $X$ and $Y$ in the following reaction sequence are:

$Ph-NC$ $\xrightarrow{LiAlH_4} A$ $\xrightarrow{NaNO_2 + HCl} B$. Identify product $B$.

Explain the nitration and sulphonation of aniline.

The correct order of basic strength of methyl-substituted amines in an aqueous medium is:

The product$(s)$ of the following reaction sequence is(are):
Aniline $\xrightarrow[\text{ii) } KBrO_3/HBr]{\text{i) Acetic anhydride/pyridine}}$ $\xrightarrow[\text{iv) } NaNO_2/HCl, 273-278 \ K]{\text{iii) } H_3O^+, \text{heat}}$ $\xrightarrow{\text{v) } Cu/HBr} \text{Product}$