Home/
Competitive Exams/
JEE Main & Advanced/
Chemistry/
General Organic Chemistry/
Question 730017
JEE Chemistry · Hard

General Organic Chemistry: Mixed MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
MixedHardQuestion 730017

Question

Among CH₃CH₂OH, CH₃COOH, HCOOH, and PhOH, the most acidic is:
  1. A
    HCOOH
    Correct
  2. B
    CH₃COOH
  3. C
    PhOH
  4. D
    CH₃CH₂OH

Correct answer

HCOOH

Explanation

pKa values: HCOOH (3.75) < CH₃COOH (4.74) < PhOH (10) < CH₃CH₂OH (16). Formic acid is most acidic due to the electron-withdrawing H on the carbonyl (no +I alkyl group), while ethanol is a very weak acid.

Review General Organic Chemistry notesStart timed chapter practice