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Question

What is the IUPAC name of oxalic acid?

This question was previously asked in
RPF SI 2018 Question Paper PDF (10-Jan-2019) (Shift 1)
The correct answer is

Ethanedioic acid

Oxalic acid is the simplest dicarboxylic acid, with formula \(HOOC-COOH\).

Its parent chain has 2 carbon atoms (eth-), and both ends carry a carboxylic acid group, so the suffix is "-dioic acid".

Combining these gives the IUPAC name ethanedioic acid; methanoic acid is formic acid, butanoic acid is butyric acid and hexanedioic acid is adipic acid.

Hence, Ethanedioic acid.

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