JEE MAIN - Chemistry (2018 - 15th April Evening Slot - No. 7)
The increasing order of the acidity of the following carboxylic acids is :
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I < III < II < IV
IV < II < III < I
II < IV < III < I
III < II < IV < I
Explanation
Electron withdrawing groups like $$-$$Cl, $$-$$CN, $$-$$NO2 increases the acidity of substituted benzoic acids, whereas electron releasing groups like $$-$$CH3, $$-$$OH, $$-$$OCH3, $$-$$NH2 decreases the acidity.
Among $$-$$NO2 and $$-$$Cl, $$-$$NO2 has stronger $$-$$ I effect than that of $$-$$ Cl.
So the correct order will be,
(III) < (II) < (IV) < (I)
Among $$-$$NO2 and $$-$$Cl, $$-$$NO2 has stronger $$-$$ I effect than that of $$-$$ Cl.
So the correct order will be,
(III) < (II) < (IV) < (I)
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