In the hydrolysis of salt of weak acid and weak base:

For $0.1 \mathrm{M} {\mathrm{CH}}_3{\mathrm{COONH}}_4$ salt solution given, ${\mathrm{K}}_{\mathrm{a}}\left({\mathrm{CH}}_3\mathrm{COOH}\right)={\mathrm{K}}_{\mathrm{b}}\left({\mathrm{NH}}_4\mathrm{OH}\right)=2\times {10}^{-5}$ .

In this case, degree of hydrolysis of cation and anion are

For a ${\mathrm{BH}}_2{\mathrm{Cl}}_2$ solution (chloride salt of a diacidic base $\mathrm{B}$): (Dissociation constants of base are  ${\mathrm{K}}_{{\mathrm{b}}_1}^{} \& {\mathrm{K}}_{{\mathrm{b}}_2}$).

Select the correct statement regarding above solution: