Question

Why carboxylic acids don't give tests for carbonyl groups?

Answer 1

The carbonyl carbon in alldehydes and ketones is more electrophilic than in carboxylic acids. This is due to the lone pairs on oxygen atom attached to hydrogen atom in the -COOH group are involved in resonance and hence making the carbon atom less electrophilic. Hence , carboxylic acids do not give the reaction of carbonly groups.

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