JEE Main 2004 Chemistry question

Which of the following compound is not chiral?

(1)1- chloropentaneCorrect
(2)3-chloro-2- methyl pentane
(3)1-chloro -2- methyl pentane
(4)2- chloropentane

Answer: (1)

Solution

1-Chloropentane, ClCH_2CH_2CH_2CH_2CH_3, has no carbon with four different groups (C-1 has two H), so it is achiral, option (1). In 3-chloro-2-methylpentane, C-3 carries H,

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Question ID VK-038400