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What is the IUPAC name of terephthalic acid?

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What is the IUPAC name of terephthalic acid?

(a) 2-Phenylethanoic acid

(b) Benzene-1,2-dicarboxylic acid

(c) Benzene-1,3-dicarboxylic acid

(d) Benzene-1,4-dicarboxylic acid

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Query is 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 option is (d) Benzene-1,4-dicarboxylic acid

The explanation: Terephthalic acid is an aromatic dicarboxylic acid with the two carboxyl groups on the opposite ends (para position) of a benzene ring. 2-Phenylethanoic acid consists of only a single carboxyl group.

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