The $pH$ is less than $7$ for the solution of:

$A$ weak acid with $pK_a$ $5.9$ and a weak base with $pK_b$ $5.8$ are mixed in equal proportions. The $pH$ of the resulting solution is:

If $0.1 \, M \, CH_3COONa$ undergoes $1 \%$ hydrolysis,then the values of $K_h$,$K_a$ of the acid,and the concentration of $CH_3COOH$ are respectively:

Which of the following has the highest degree of hydrolysis?

What will be the $pH$ of an aqueous solution of $1.0 \ M$ ammonium formate? (Given: $pK_a = 3.8$ and $pK_b = 4.8$)

$A$ few grams of sodium carbonate $(Na_2CO_3)$ is added to $1 \ L$ of water. What is the $pH$ or $pH$ range of the resultant solution?