JEE Main Chemistry question

The correct IUPAC name of CH₃CH₂CH(C₂H₅)–CH=CH–CH(C₂H₅)CH₂CH₂CH₂CH₃, bearing an additional methyl branch, is

(A)5,6-dimethyl-8-methyldec-6-ene
(B)6-butyl-5-ethyl-3-methyloct-4-ene
(C)5,6-diethyl-3-methyldec-4-eneCorrect
(D)2,4,5-triethylnon-3-ene

Answer: (C)

Solution

The longest chain through the C=C is a 10-carbon (decane) chain. Ethyl substituents sit at C5 and C6 (flanking the C4=C5... here the double bond is at C4–C5 after renumbering for lowest

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Question ID VK-138970