Write the chemical equation of following reaction?
(a) Wurtz reaction
(b) Finkelstein reaction.

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Solution

The chemical equations:
(a) Wurtz reaction:
Alkyl halides react with sodium/ dry ether to form higher alkanes.
$2 C H_{3} - B r methyl bromide + 2 N a dry ether - ---- \to C H_{3} - C H_{3} ethane + 2 N a B r$
(b) Finkelstein reaction:
The reaction between alkyl chlorides/ bromides and NaI/ dry acetone gives alkyl iodides.
$C H_{3} - C H_{2} - B r ethyl bromide + N a I \to C H_{3} - C H_{2} - I ethyl iodide + N a B r$

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