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4-Aminobenzoic acid has a lower pKa value compared to aniline.

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in Chemistry – Class 12 by (188k points)
4-Aminobenzoic acid has a lower pKa value compared to aniline.

(a) True

(b) False

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I would like to ask this question from Amines Chemical Reactions topic in division Amines of Chemistry – Class 12

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Right choice is (a) True

The best I can explain: Lower pKa value means more acidic, that is less basic, which means a higher pKb value than aniline. 4-Aminobenzoic acid can be thought of as aniline with COOH group substituted at para position. Since COOH is electron withdrawing in nature, it reduces the basic strength of aniline.

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