The correct order of acidity of the following | vedclass

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(A) The acidic strength of phenols is influenced by the nature of substituents attached to the benzene ring. Electron-withdrawing groups $(EWG)$ incre

Vedclass · Accepted Answer

$I > II > III$

Vedclass · Answer

(A) The acidic strength of phenols is influenced by the nature of substituents attached to the benzene ring. Electron-withdrawing groups $(EWG)$ increase acidity,while electron-releasing groups $(ERG)$ decrease acidity.$I$ is phenol.$II$ is $p$-cresol,which has a methyl group $(-CH_3)$ at the para position. The methyl group is an electron-releasing group due to the $+I$ effect and hyperconjugation,which decreases the acidity compared to phenol.$III$ is $p$-methoxyphenol,which has a methoxy group $(-OCH_3)$ at the para position. The methoxy group is a strong electron-releasing group due to the $+M$ (mesomeric) effect,which significantly decreases the acidity compared to phenol and $p$-cresol.Therefore,the order of acidity is $I > II > III$.

The correct order of acidity of the following is:

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