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Question

Arrange the following in order of decreasing acidic strength. nitrophenol (I), p-cresol (II), m-cresol phenol (IV) :

A
I>IV>II>III
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B
IV>III>II>I
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C
I>II>III>IV
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D
III>II>I>IV
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Solution

The correct option is B I>IV>II>III
We know that +I (CH3) groups decrease acidity in Phenols while -I (NO2) groups increase them. Hence, I is the most acidic while III is the least (as +I group CH3 is situated closer to the OH group).
Hence, Option A is the correct answer.
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