JEE Main 2016 Chemistry question

The hydrocarbon with seven carbon atoms containing a neopentyl and a vinyl group is:

(1)dimethylpentene
(2)dimethylpenteneCorrect
(3)Isopropylbutene
(4)dimethylpentene

Answer: (2)

Solution

Identify the two fragments. The **neopentyl** group is , containing five carbons, and the **vinyl** group is , containing two — together exactly seven, as required. Joining them gives

(CH_C-CH_2-CH=\text{C

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Question ID VK-115535