Which functional group is present in carboxylic acids?
Answer and explanation
Correct answer: A. −COOH
- Step 1: Carboxylic acids are organic compounds characterized by a carbonyl group attached directly to a hydroxyl group.
- Step 2: The combined functional group is called a carboxyl group.
- Step 3: Its structural formula is written as .
Answer
−COOH.
Why not the others: The alternative options (−CHO, −OH, −NH) correspond to incorrect stoichiometric ratios, wrong reaction intermediates, or arithmetic evaluation errors.
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