Q. Which one is the most acidic compound ?
A) p-Cresol (4-methylphenol)
B) Phenol
C) p-Nitrophenol (4-nitrophenol)
D) Picric acid (2,4,6-trinitrophenol)
Explanation
[Solution] Three electron-withdrawing $-NO_2$ groups strongly stabilise the phenoxide ion, making picric acid most acidic. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.