Question

The strongest conjugate base is:
(correct answer +1, wrong answer -0.25)

• A. $N{O}_3^{-}$
• B. $C{l}^{-}$
• C. $S{O}_4^{2-}$
• D. $C{H}_{3}CO{O}^{-}$

Answer 1

The correct option is D $C{H}_{3}CO{O}^{-}$

Weaker the acid, stronger is the conjugate base.
Among the acids,$HN{O}_3,HCl,H_{2}S{O}_4$ and $C{H}_{3}COOH$, acetic acid i.e., $C{H}_{3}COOH$ is the weakest acid and hence $C{H}_{3}CO{O}^{-}$ is the strongest base.