Which one of the following compounds exhibits optical isomerism?
A
n-propanol
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B
2-chlorobutane
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C
n-butanol
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D
4-hydroxyheptane
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Solution
The correct option is B 2-chlorobutane 2-chlorobutane exhibits optical isomerism because it contains chiral carbon atom. A chiral centre in an organic compound is a carbon atom directly connected to four different groups. Chiral compounds with one chiral centre always exhibit optical isomerism.