In The Following Compounds The Order Of Acidity Is

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Question

In the following compounds

The order of acidity is

easy

Solution

Correct option is

IV > III > I > II

Nitro group from para position exert electron withdrawing resonance effect, increases acidity of phenol the most. This is followed by meta nitrophenol in which nitro group exert electron withdrawing effect on acidity. CH₃â€• is an electron donating group, decreases acid strength. Hence, the overall order is