Q. The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is:
A) A > C > B > D
B) B > A > D > C
C) B > D > C > A
D) A > B > C > D
Explanation
[Solution from source] Electron-withdrawing (−I) groups stabilise the carboxylate ion. F is more electronegative than Cl, so CF₃COOH > CCl₃COOH; HCOOH is stronger than CH₃COOH because CH₃ is electron-releasing. Order: trifluoroacetic > trichloroacetic > formic > acetic. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.