$BF_3$ is an acid according to the ....... concept.

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 :-

According to the Bronsted-Lowry concept,the correct order of relative strength of bases follows the order:

What is the conjugate base of $OH^{-}$?

How many of the following are diprotic acids? Citric acid, Chromic acid, Oxalic acid, Pyrosulfuric acid, Sulfurous acid

In $NH_3$ and $PH_3$,the common property is