The correct order of acid strengths of benzoi | vedclass

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Question

(C) $p-$nitrobenzoic acid $(Z)$ contains a $-NO_2$ group, which is a strong electron-withdrawing group. This stabilizes the carboxylate anion through

Vedclass · Accepted Answer

$Z > X > Y$

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(C) $p-$nitrobenzoic acid $(Z)$ contains a $-NO_2$ group, which is a strong electron-withdrawing group. This stabilizes the carboxylate anion through both inductive and resonance effects, making it the most acidic.Benzoic acid $(X)$ is stabilized by resonance of the carboxylate group with the benzene ring.Peroxybenzoic acid $(Y)$ has the structure $C_6H_5CO_3H$. The $-O-O-$ bond is less stable and the resonance stabilization of the carboxylate anion is less effective compared to benzoic acid due to the presence of the extra oxygen atom, making it less acidic than benzoic acid.Therefore, the correct order of acid strength is $Z > X > Y$.

The correct order of acid strengths of benzoic acid $(X)$, peroxybenzoic acid $(Y)$ and $p-$nitrobenzoic acid $(Z)$ is

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