Arrange benzoic acid, 4-methyl benzoic acid and 4-nitrobenzoic acid in increasing order of their acidic strength.

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Solution

The increasing order of acidic strength is $4 - n i t r o b e n z o i c a c i d$ > $b e n z o i c a c i d$ > $4 - m e t h y l b e n z o i c a c i d$ .
In aromatic acids, electron withdrawing groups like nitro increase the acidity whereas electron releasing groups like methyl decrease the acidity.

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Arrange benzoic acid, 4-methyl benzoic acid and 4-nitrobenzoic acid in increasing order of their acidic strength.

The increasing order of acidic strength is 4−nitrobenzoicacid > benzoicacid > 4−methylbenzoicacid. In aromatic acids, electron withdrawing groups like nitro increase the acidity whereas electron releasing groups like methyl decrease the acidity.

The increasing order of acidic strength is $4 - n i t r o b e n z o i c a c i d$ > $b e n z o i c a c i d$ > $4 - m e t h y l b e n z o i c a c i d$ .
In aromatic acids, electron withdrawing groups like nitro increase the acidity whereas electron releasing groups like methyl decrease the acidity.