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Question

Which of the following reactants is suitable for preparation of methane and ethane by using one step only?

A
H2C=CH2
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B
CH3OH
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C
CH3Br
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D
CH3CH2OH
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Solution

The correct option is C CH3Br
Preperation of alkane from alkyl halide :

Methane preparation from CH3Br :

CH3Br+H2Zn,dil. HClCH4+ZnBr2
Here Zn,dil.HCl acts as reducing agent.


Ethane preperation from CH3Br:
Wurtz reaction :

CH3Br+2Na+BrCH3Dry etherCH3CH3+2NaBr

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