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Which of the following substituted pheno...

Which of the following substituted phenols is the strongest acid?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
Acidic strength of phenol is enhanced by the presence of electron- withdrawing groups which stabilized the phenoxide ion.
While presence of electron- donating group like `CH_(3),C_(2)H_(3)` destabilizes the phenoxide ion, thus decreasing the acidic strength
Due to the presence of strong electron- withdrawing group - `NO_(2)(-I, -R)`, p-nitro phenol is the strongest acid.
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