A) Aspirin
B) Benzoic acid
C) Picric acid
D) All have ?COOH group
Correct Answer: C
Solution :
Picric acid is 2, 4, 6-trinitro phenol. It has three powerful electron-withdrawing groups which stabilize the corresponding phenoxide ion by resonance also. Hence, picric acid is a strong acid\[(p{{K}_{a}}\approx 2).\]
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