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In an alkyl halide, the carbon attached to the halogen is called α-carbon and the adjacent carbon is the β-carbon. In a β-elimination reaction:
AThe α-carbon loses both the halogen and a hydrogen
BBoth α and β carbons lose halogens
CA halogen is lost from the α-carbon AND an H atom is lost from a β-carbon → alkene forms
DNothing is eliminated
Answer & Solution
Correct answer: C. A halogen is lost from the α-carbon AND an H atom is lost from a β-carbon → alkene forms
**β-elimination = dehydrohalogenation**: -X leaves from **α-C**, an **H leaves from a β-C** → double bond between α and β carbons. Net: HX is eliminated, producing an alkene.
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