JEE Main Chemistry question

The isomeric *cis*-2-butene and *trans*-2-butene can be distinguished on the basis of

(A)Their physical nature
(B)Their reduction products
(C)The products they give on ozonolysis
(D)The products they give on addition of bromineCorrect

Answer: (D)

Solution

Ozonolysis of either isomer gives the same achiral carbonyl fragments (acetaldehyde ×2) and cannot distinguish them; catalytic hydrogenation gives the same alkane

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Question ID VK-139931