Question

Picric acid is a stronger acid than acetic acid and benzoic acid. It contains

• A. $- SO _{3} H$ group
• B. two $-COOH$ groups
• C. phenolic group
• D. three $-COOH$ groups

Answer 1

Answer: (C)

phenolic group

Answer 2

Picric acid is $2,\, 4,\, 6$-trinitrophenol. It, due to presence of three $-I$ showing $-NO_{2}$ groups, is more acidic than acetic acid and benzoic acid.