MCQ
Among the following compounds, the most acidic is
- A$p$-nitrophenol
- B$p$-hydroxybenzoic acid
- ✓$o$-hydroxybenzoic acid
- D$p$-toluic acid
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. . . . . (Given that the value of solubility product of $A B \left( K _{ sp }\right)=2 \times 10^{-10}$ and the value of ionization constant of $H B \left( K _{ a }\right)=1 \times 10^{-8}$ )