Which of the following organic acid does NOT have a COOH group?
Correct answer: D. Picric acid
- A. Acetic acid
- B. Ascorbic acid
- C. Butyric acid
- D. Picric acid
Explanation
Picric acid (2,4,6-trinitrophenol) does not have a COOH group. Instead, it has a phenol group (-OH) with three nitro groups (-NO2) attached to the benzene ring.
This question appeared on the KMU MDCAT 2023 (retake) paper, which you can sit online with every answer explained.
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About Reactivity of Carboxylic Acids
Carboxylic acids show acidic behaviour because their carboxylate ions are resonance-stabilised, and electron-withdrawing groups can change their strength. Reactions include neutralisation, esterification, formation of acid chlorides and amides, reduction, decarboxylation and substitution at the acyl carbon, which differs from the reactions of phenols.
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550 free Carboxylic Acids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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