Which of the following phenols has the larges | vedclass

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(C) The acidity of phenols is determined by the stability of the phenoxide ion formed after the loss of a proton. Electron-withdrawing groups $(EWG)$

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$p$-methylphenol

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(C) The acidity of phenols is determined by the stability of the phenoxide ion formed after the loss of a proton. Electron-withdrawing groups $(EWG)$ increase acidity (decrease $pK_a$),while electron-donating groups $(EDG)$ decrease acidity (increase $pK_a$).$1$. $p$-nitrophenol $(-NO_2)$: Strong $-M$ and $-I$ effect,highly acidic.$2$. $p$-cyanophenol $(-CN)$: Strong $-M$ and $-I$ effect,highly acidic.$3$. $p$-chlorophenol $(-Cl)$: $-I$ effect dominates,acidic.$4$. $p$-methylphenol $(-CH_3)$: $+I$ and hyperconjugation effect $(EDG)$,least acidic.Since $p$-methylphenol is the least acidic,it has the largest $pK_a$ value.

Which of the following phenols has the largest $pK_a$ value (i.e.,is least acidic)?

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