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  4. By which one of the following compounds both CH4 and CH3-CH3 can be prepared in one step?

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Q. By which one of the following compounds both $CH_{4}$ and $CH_{3}-CH_{3}$ can be prepared in one step?

JIPMERJIPMER 2006Aldehydes Ketones and Carboxylic Acids

Solution:

$CH_3I +2H\xrightarrow[{or Zn -Cu/C_2H_5OH}]{{Zn + HCl}}\underset{\text{Methane}}{CH_4} + HI$
$CHI_3 + 2Na +ICH_3 \xrightarrow{\text{dry ether}}\underset{\text{Ethane}}{CH_3 -CH_3} + 2NaI$