$CH_3COOH_{(aq)} + H_2O_{(l)} \rightleftharpoons H_3O^{+}_{(aq)} + CH_3COO^{-}_{(aq)}$. Between $H_2O$ and $CH_3COO^{-}$,which one is the weaker base?

Acidity of $BF_3$ can be explained on which of the following concepts?

Which of the following is the strongest acid?

The conjugate base of $HSO_4^-$ is:

The dissociation constant values of three acids $A$,$B$ and $C$ are $1.8 \times 10^{-5}$,$1.5 \times 10^{-4}$ and $5.2 \times 10^{-8}$ respectively. The correct order of increasing basic nature of their conjugate bases is $-$

At $25^{\circ} C$,if $[OH^{-}] < 10^{-8} \ M$,then the possible nature of the aqueous solution is$-$