The $pK_a$ for acid $A$ is greater than $pK_a$ for acid $B$. The strong acid is

If $pK_b$ of a base is $5$,then $K_a$ of its conjugate acid will be

Which of the following oxides will not give $OH^{-}$ ions in aqueous solution?

Which of the following is the weakest base?

An aqueous solution of an acid is characterized by the presence of:

The ionization constants of $HF$,$HCOOH$,and $HCN$ at $298 \ K$ are $6.8 \times 10^{-4}$,$1.8 \times 10^{-4}$,and $4.8 \times 10^{-9}$ respectively. Calculate the ionization constants of their corresponding conjugate bases.