JEE Main Chemistry question

The correct IUPAC name of the shown ethyl/methyl-substituted hexenoic acid, with Z-alkene geometry, is

(A)Z-3-ethyl-4-methylhex-3-enoic acidCorrect
(B)Z-3-ethyl-4-methylhexanoic acid
(C)Z-3,4-diethylpent-3-enoic acid
(D)E-3-ethyl-4-methylhex-4-enoic acid

Answer: (A)

Solution

The carboxylic acid carbon fixes C1; the longest chain carrying an ethyl substituent at C3 and a methyl substituent at C4 across a C3=C4 double bond is a hexenoic acid. Applying CIP priorities

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Question ID VK-139005