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Question 730011
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General Organic Chemistry: JEE Main MCQ

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JEE MainHardQuestion 730011

Question

Among the following, which compound shows the highest acidity?
  1. A
    CH₃COOH
  2. B
    CF₃COOH
    Correct
  3. C
    CCl₃COOH
  4. D
    CHCl₂COOH

Correct answer

CF₃COOH

Explanation

Electron-withdrawing groups stabilise the carboxylate anion, increasing acidity. F is more electronegative than Cl, so CF₃COOH has stronger −I effect than CCl₃COOH. pKa: CF₃COOH (0.23) < CCl₃COOH (0.65) < CHCl₂COOH (1.29) < CH₃COOH (4.74).

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