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Question

The following compound which cannot be prepared by Wurtz reaction?

A
Methane
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B
Ethane
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C
Butane
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D
Propane
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Solution

The correct option is A Methane
Methane cannot be prepared by Wurtz reaction.
In wurtz reaction, two molecules of alkyl halides combine (on heating with sodium metal in presence of dry ether as solvent) to produce higher alkanes containing even number of carbon atoms.
CH3I+2Na+ICH3 dry ether−−−−ΔCH3CH3+2NaI

Methane cannot be prepared by Wurtz reaction.

A mixture of two different alkyl halides on heating with sodium will give three different alkanes.

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