What will be the $pH$ of an aqueous solution of $MgCl_2$?

In which of the following salts does hydrolysis take place?

$A$ $100 \ L$ solution of $KCN$ undergoes $3.7\%$ hydrolysis. If the dissociation constant of $HCN$ is $7.2 \times 10^{-10}$,find the value of $K_w$.

Mohr's salt is a

Which of the following salts does not undergo hydrolysis in water?

Which of the following solutions has the maximum $pH$ value?