Question

For the reaction ${\text{NH}}_{\text{4}}^{\text{+}}\text{+}{\text{S}}^{\text{- 2}}\rightleftharpoons \text{N}{\text{H}}_{\text{3}}\text{+ H}{\text{S}}^{\text{-}}\text{, N}{\text{H}}_{\text{3}}$ and ${\text{S}}^{\text{- 2}}$ are a group of :-

• A. Acids
• B. Bases
• C. Acid-base pair
• D. None of these

Answer 1

The correct option is C Acid-base pair

$N{H_4}^{+}+S^{-2}\rightleftharpoons N{H}_3+H{S}^{-}$

Acid Base C.B C.A

$N{H}_3$ is conjugate base of $N{H_4}^{+}$ and $S^{-2}$. Hence both are acid-base pair.

Ans-option C