$\left(\mathrm{p}\right)\mathrm{}$ Neither ${\mathrm{K}}^{+}$ nor $\mathrm{S}{\mathrm{O}}_4^{2-}$ ions undergo hydrolysis. So it is neutral.
$\left(\mathrm{q}\right)\mathrm{}$ Sodium ions are not hydrolyzed, but acetate ions hydrolyze to form strong base, $\mathrm{O}{\mathrm{H}}^{-}$
$\mathrm{C}{\mathrm{H}}_3\mathrm{C}\mathrm{O}{\mathrm{O}}^{-}+{\mathrm{H}}_2\mathrm{O}\to \underset{\left(\text{weakacid}\right)}{\mathrm{C}{\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}}+\underset{\left(\text{strongbase}\right)}{\mathrm{O}{\mathrm{H}}^{-}}$
$\left(\mathrm{r}\right)\mathrm{}\mathrm{C}{\mathrm{l}}^{-}$ ions are not hydrolyzed. $\mathrm{N}{\mathrm{H}}_4^{+}$ hydrolyse to form strong acid, ${\mathrm{H}}_3{\mathrm{O}}^{+}$ .
$\mathrm{N}{\mathrm{H}}_4^{+}+{\mathrm{H}}_2\mathrm{O}\to \underset{\left(\text{weakbase}\right)}{\mathrm{N}{\mathrm{H}}_3}+\underset{\left(\text{strongacid}\right)}{{\mathrm{H}}_3{\mathrm{O}}^{+}}$
$\left(\mathrm{s}\right)\mathrm{}\mathrm{C}{\mathrm{a}}^{2+}$ and $\mathrm{H}\mathrm{C}\mathrm{O}{\mathrm{O}}^{-}$ ions are hydrolyzed to form an acid and a base, but the pH cannot be predicted without the knowledge of hydrolysis constants of $\mathrm{C}{\mathrm{a}}^{2+}$ and $\mathrm{H}\mathrm{C}\mathrm{O}{\mathrm{O}}^{-}$ .