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Carboxylic Acids — Easy JEE chemistry MCQ

Which is the strongest acid among the following?
  1. A. $CCl_3COOH$
  2. B. $CH_3COOH$
  3. C. $CHCl_2COOH$
  4. D. $CH_2ClCOOH$

Solution

Electron-withdrawing groups (-I effect) increase acidity. More Cl atoms = stronger -I effect. $CCl_3COOH$ (trichloroacetic acid) is strongest due to three Cl atoms.

CHEMISTRY

easy • PYQ Reworded
Question
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Which is the strongest acid among the following?
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