What is the effect of electron withdrawing groups on the acidity of ph

1.	What is the effect of electron withdrawing groups on the acidity of phenol?
Answer» When an electron withdrawing group like the nitro group is present on the benzene ring, the acidic strength of phenol increases. When these groups are present at ortho and para positions then their effect is more because delocalisation of negative charge is more effective in peroxide ion.

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