6. Among the following compounds, the most acidic is (A) $p$-nitrophenol (B) p-hydroxybenzoic acid (C) o-hydroxybenzoic acid (D) $p$-toluic acid ANSWER: C
6. Among the following compounds, the most acidic is\\
(A) $p$-nitrophenol\\
(B) p-hydroxybenzoic acid\\
(C) o-hydroxybenzoic acid\\
(D) $p$-toluic acid
ANSWER: C\\