Question

Which among the following is dicarboxylic acid?

Options

• Acetic acid

• Phthalic acid

• Caproic acid

• Citric acid

Answer 1

Phthalic acid

Explanation:

Phthalic acid is an aromatic dicarboxylic acid with the chemical formula C₆H₄(COOH)₂. By definition, a dicarboxylic acid is an organic compound that contains two carboxyl (–COOH) functional groups. Phthalic acid specifically consists of a benzene ring with two carboxyl groups attached at the ortho positions (benzene-1,2-dicarboxylic acid).