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NTA Abhyas JEE Main2020ChemistryAlcohols Phenols and EthersPractice

Mark the correct order of decreasing acid strength of the following compounds.

Options

  1. A(V) > (IV) > (II) > (I) > (III)
  2. B(II) > (IV) > (I) > (III) > (V)
  3. C(IV) > (V) > (III) > (II) > (I)
  4. D(V) > (IV) > (III) > (II) > (I)

Correct answer

B. (II) > (IV) > (I) > (III) > (V)

Step-by-step solution

The electron withdrawing group - N O 2 increases the acidity of phenols and the electron donating group - O C H 3 decreases the acidity of phenols. The effect oat p-position is greater than at m-position. Hence the order of acidic nature is (II) > (IV) > (I) > (III) > (V).

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