JEE Main Chemistry question

Which of the following will have a meso isomer also?

(A)2-chlorobutane
(B)2,3-dichlorobutaneCorrect
(C)2,3-dichloropentane
(D)2-hydroxypropanoic acid

Answer: (B)

Solution

2,3-Dichlorobutane, CH₃–CHCl–CHCl–CH₃, has two stereocenters in a symmetric molecule (identical groups flank each side), permitting an internally compensated meso form. (A) and

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Question ID VK-139123