JEE Main Chemistry question

Carboxylic acids readily dissolve in aqueous sodium bicarbonate, liberating carbon dioxide. Which one of the following is correct?

(A)Free carboxylic acid and its conjugate base are of comparable stability.
(B)The free carboxylic acid is more stable than its conjugate base.
(C)The conjugate base of the carboxylic acid is more stable than the free carboxylic acid.Correct
(D)The conjugate acid of the carboxylic acid is more stable than the free carboxylic acid.

Answer: (C)

Solution

A carboxylic acid is acidic enough to react with the weak base bicarbonate (releasing CO₂ gas) precisely because its conjugate base, the carboxylate ion, is substantially stabilized by

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Question ID VK-149235