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Question

What is the IUPAC name of malonic acid?

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

Propanedioic acid

Malonic acid is a dicarboxylic acid with the structure HOOC-CH₂-COOH.

In IUPAC naming, a dicarboxylic acid is named as alkane + 'dioic acid', counting the carbon atoms of both carboxyl groups in the main chain.

Malonic acid has a three-carbon chain (propane) with -COOH groups at both ends, so its IUPAC name is propanedioic acid.

Hence, Propanedioic acid.

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