JEE Advanced 2011 Chemistry question

Among the following compounds, the most acidic is

(A)p-nitrophenol
(B)p-hydroxybenzoic acid
(C)o-hydroxybenzoic acidCorrect
(D)p-toluic acid

Answer: (C)

Solution

Carboxylic acids are much stronger acids than phenols, so p-nitrophenol () is the weakest of the four. Among the acids: p-toluic acid () is weakened by the electron-donating ; p-hydroxybenzoic acid (K_a$

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Question ID VK-025880