Which of the following salts will not undergo hydrolysis?

If the $pKa$ of lactic acid is $5$,then the $pH$ of $0.005 \ M$ calcium lactate solution at $25^{\circ} \ C$ is $........ \times 10^{-1}$ (Nearest integer). The structure of lactic acid is given below:

The concentration of $[H^{+}]$ in a $0.1 \, M \, CH_3COONa$ solution [$K_a = 10^{-5}$] is equal to ......

An aqueous solution of aluminium sulphate shows

The $pK_a$ value for acetic acid at the experimental temperature is $5$. The percentage hydrolysis of $0.1 \ M$ sodium acetate solution will be:

$pH$ of $NH_4Cl$ solution is $5.28$. Calculate the degree of hydrolysis $(h)$ of its $0.02 \ M$ solution.