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Which of the following alkane cannot be made in good yield by Wurtz reaction?

1. 2,3-Dimethylbutane
2. n-Heptane
3. n-Butane
4. n-Hexane

Correct answer: n-Heptane

Solution

Wurtz reaction involves coupling of alkyl halides, and it works best for symmetrical alkanes. n-Heptane is an unsymmetrical alkane, making it difficult to obtain in good yield via this method.

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