$NH_4OH$ is a weak base because

Which salt can be classified as an acid salt?

The conjugate base of $HCO_3^-$ is

In the following ionic equilibrium,the conjugate acid of $H_2O_2$ is ........
$H_2O_2 + H_2O \rightleftharpoons H_3O^+ + HO_2^-$

If $pK_b$ for fluoride ion $(F^-)$ at $25\,^{\circ}C$ is $10.83$,the ionisation constant $(K_a)$ of hydrofluoric acid $(HF)$ in water at this temperature is:

The dissociation constants of two acids $HY$ and $HZ$ are $2.88 \times 10^{-4}$ and $1.8 \times 10^{-5}$ respectively. The relative strength of the acids will be :-