A) \[-\text{S}{{\text{O}}_{\text{3}}}\text{H}\]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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