Arrange the following compounds in decreasing | vedclass

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Question

(A) The acidic strength of phenols depends on the nature of the substituent attached to the benzene ring.Electron-withdrawing groups $(EWG)$ like $-NO

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$(ii) > (i) > (iii)$

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(A) The acidic strength of phenols depends on the nature of the substituent attached to the benzene ring.Electron-withdrawing groups $(EWG)$ like $-NO_2$ increase the acidic strength by stabilizing the phenoxide ion through $-I$ and $-M$ effects.Electron-donating groups $(EDG)$ like $-CH_3$ decrease the acidic strength by destabilizing the phenoxide ion through $+I$ and hyperconjugation effects.Compound $(ii)$ has a $-NO_2$ group (strong $EWG$),which makes it the most acidic.Compound $(i)$ is phenol (no substituent).Compound $(iii)$ has a $-CH_3$ group $(EDG)$,which makes it the least acidic.Therefore,the decreasing order of acidic strength is $(ii) > (i) > (iii)$.

Arrange the following compounds in decreasing order of their acidic strength.

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