Given are cyclohexanol (I), acetic acid (II), 2,4,6-trinitrophenol (III) and phenol (IV). In these, the order of decreasing acidic character will be

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III > IV > II > I

III > II > IV > I

II > III > I > IV

II > III > IV > I

answer is B.

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Detailed Solution

Order of acidic strength : acids > phenols > alcohols. but picric acid is stronger acid than acetic acid due to strong -I effect of Nitro group. Then COOH compound are more acidic. Alcohols are least acidic, since they cant stabilise.

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