Write the reduction equation of nitro benzene in presence of $\mathrm{Zn}+\mathrm{HCl}$.

Identify compounds A,B and C in the following sequence of reactions.

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{NC}\stackrel{\mathrm{HgO}}{\to } \mathrm{A} \stackrel{{\mathrm{H}}_2\mathrm{O}}{\to } \mathrm{B} \underset{\mathrm{ii}){\mathrm{H}}_2\mathrm{O}}{\overset{\mathrm{i}){\mathrm{NaNO}}_{2 }/ \mathrm{HCl} }{\to }}$

Give the IUPAC name of the following compound.

Account for the following:

Reduction of alkyl cyanide forms primary amine whereas alkyl isocyanide forms secondary amine.

Complete the following conversion.

${\mathrm{CH}}_3\mathrm{NC}+ \mathrm{HgO}\to ?$

Account for the following:

Ethylamine is soluble in water whereas aniline is not.

Arrange the following in increasing order of boiling point: ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{O}\mathrm{H}, {\left(\mathrm{C}{\mathrm{H}}_3\right)}_2\mathrm{N}\mathrm{H}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$.

Arrange the following amines in the increasing order of their ${\mathrm{pK}}_{\mathrm{b}}$ values

Aniline, N - methylaniline and cyclohexylamine