S Block Elements Question 231

Question: Which one of the following salts gives aqueous solution which is weakly basic

[Bihar CEE 1995]

Options:

A) $ NaHCO_3 $

B) $ NaHSO_4 $

C) $ NaCl $

D) $ NH_4HCO_3 $

Show Answer

Answer:

Correct Answer: A

Solution:

$ \underset{\begin{smallmatrix} \text{(Salt of strong} \\ \text{base }\And\text{ weak} \\ \text{acid)} \end{smallmatrix}}{\mathop{NaHCO_3}}\to N{{a}^{+}}+\underset{O{{H}^{-}}+CO_2}{\mathop{\underset{\downarrow }{\mathop{HCO_3^{-}}}}} $