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Question

Assertion :When cis3,4dimenthyl3hexene is hydrogenated in presence of a Ni catalyst, a meso hydrocarbon is obtained, However, when trans3,4dimethyl3hexene is hydrogenated with Ni catalyst, a racemic mixture of product is obtained Reason: Catalytic hydrogenation occur in syn orientation

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Syn orientation is obtained during catalytic hydrogenation as the reaction occurs on the surface of the catalyst. Thus, cis alkene gives meso product and the trans alkene gives the racemic product.

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