A) \[\text{ }S{{O}_{3}}H\]group
B) two -COOH groups
C) phenolic group
D) three - COOH groups
Correct Answer: C
Solution :
Picric acid is 2, 4, 6-trinitrophenol. It, due to presence of three\[-I\]showing\[-N{{O}_{2}}\]groups, is more acidic than acetic acid and benzoic acid.
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