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Question

Which of the following compounds can be best prepared by Wurtz-reaction?

A
Isobutane
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B
n-butane
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C
n-pentane
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D
Isopentane
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Solution

The correct option is B n-butane
2CH3CH2ClNaDry wtherCH3CH2CH2CH3
It is not preferable to use different alkyl halides because the mixture of products are formed, and hence yield of any product is not significant. Therefore we choose same alkyl halides, and hence alkyl halides with even number of C atoms gives maximum yield.

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