The salt that forms a neutral solution in water is

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:

Which of the following has the lowest degree of hydrolysis?

If the $pK_b$ for $CN^-$ is $4.7$ at $25\,^oC$,then the $pH$ of a $0.5\,M \,NaCN$ solution is:

Which salt will give a basic solution on hydrolysis?

The hydrolysis constant $(K_h)$ of $CH_3COONH_4$ is proportional to which of the following?