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Which of the following has two carboxyl groups in its structure?

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in Chemistry – Class 12 by (188k points)
Which of the following has two carboxyl groups in its structure?

(a) Succinic acid

(b) Crotonic acid

(c) Cinnamic acid

(d) Mandelic acid

The question was asked in unit test.

Question is taken from Nomenclature and Structure of Carboxyl Groups topic in division Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

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The correct choice is (a) Succinic acid

The explanation is: Succinic acid is a dicarboxylic acid with 4 carbon atoms in its structure. Its IUPAC name is butanedioic acid. Crotonic acid is but-2-enoic acid, whereas cinnamic acid and mandelic acid consists only a single carboxyl group along with a phenyl group.

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