MHT CET Chemistry Question (2026) — Solution

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The principal functional group is the carboxylic acid (- COOH ), so numbering starts from the carbon atom of the - COOH group. The longest carbon chain containing the principal functional group has 6 carbon atoms, so the root word is 'hex'. There are two double bonds located at C2 and C4, so the primary suffix is '2,4-diene'. The secondary suffix for the carboxylic acid is 'oic acid'. Combining these parts, the IUPAC name of the compound is Hexa-2,4-dienoic acid. Answer: Hexa-2,4-dienoic acid