Question:
The number of compound/s given below which contain/s —COOH group is ________ . (Integer answer)
(A) Sulphanilic acid (B) Picric acid (C) Aspirin (D) Ascorbic acid
The number of compound/s given below which contain/s —COOH group is ________ . (Integer answer)
(A) Sulphanilic acid (B) Picric acid (C) Aspirin (D) Ascorbic acid
(A) Sulphanilic acid (B) Picric acid (C) Aspirin (D) Ascorbic acid
Show Hint
Don't be misled by the word "acid" in a common name. Always rely on the chemical structure. Picric acid is a phenol, sulphanilic acid is a sulfonic acid, and ascorbic acid's acidity comes from enol groups, not a carboxyl group. Only aspirin is a true carboxylic acid among these choices.
Updated On: Feb 2, 2026
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Correct Answer: 1
Solution and Explanation
Check presence of –COOH group:
Sulphanilic acid: –SO$_3$H (No –COOH)
Picric acid: Phenolic –OH (No –COOH)
Aspirin: Contains –COOH
Ascorbic acid: Enediol lactone (No –COOH)
Total compounds containing –COOH \[ \boxed{1} \]
Sulphanilic acid: –SO$_3$H (No –COOH)
Picric acid: Phenolic –OH (No –COOH)
Aspirin: Contains –COOH
Ascorbic acid: Enediol lactone (No –COOH)
Total compounds containing –COOH \[ \boxed{1} \]
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