The hydrolysis reaction $A^{-} + H_2O \rightleftharpoons HA + OH^{-}$ indicates that the salt is formed from:

Which among the following salts turns blue litmus red in its aqueous solution?

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:

Ionization constants for $CH_3COOH$ and $HCN$ are respectively $1.8 \times 10^{-5}$ and $7.2 \times 10^{-10}$. The degree of hydrolysis of $0.1 \ M \ KCN$ $(h_1)$ and $0.1 \ M \ CH_3COOK$ $(h_2)$ follows the order :

An aqueous solution of $Al_2(SO_4)_3$ is .......

How many hydroxide ions are produced by the hydrolysis of one mole of sodium carbonate $(Na_2CO_3)$?