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

$A$ white substance having alkaline nature in solution is

Which one of the following salts on being dissolved in water gives $pH > 7$ at $25^{\circ} C$?

Calculate the $pH$ of a $0.5 \ M$ aqueous solution of $KCN$. Given that $pK_{b}$ for $CN^{-} = 4.70$. (in $.5$)

$A$ solution of sodium chloride in contact with the atmosphere has a $pH$ of about

In the equilibrium $A^{-} + H_{2}O \rightleftharpoons HA + OH^{-}$ $(K_{a} = 1.0 \times 10^{-5})$,the degree of hydrolysis of a $0.001 \ M$ solution of the salt is: