The conjugate base of $NH_2^-$ is

What will be the conjugate bases for the Bronsted acids: $HF$,$H_2SO_4$,and $HCO_3^-$?

The conjugate acid of $(A)$ is

In the reaction $NH_4^+ + S^{2-} \rightarrow NH_3 + HS^-$,what are $NH_3$ and $HS^-$ with respect to the $NH_4^+$ and $S^{2-}$ species?

Arrange the anions $(p) \text{CH}_3^{-}, (q) \text{NH}_2^{-}, (r) \text{OH}^{-}, (s) \text{F}^{-}$ in decreasing order of their basic strength.

The compound $HCl$ behaves as $...$ in the reaction,$HCl + HF \to H_2Cl^{+} + F^{-}$