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Explain elimination reaction. Give examp...

Explain elimination reaction. Give example.

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When a haloalkane is heated with alcoholic potassium hydroxide, there is elimination of hydrogen from `beta`-carbon and a halogen atom from the `prop`-carbon atom. As a result, an alkene is formed. This reaction is called `beta`-elimination reaction or dehydrohalogenation reaction.
`CH_(3) - CH_(2) - Br + underset("Alco")(KOH)rarr underset("Ethene")(CH_(2)=)CH_(2) + HBr + H_(2)O`
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