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| resources for science teachers who like to think TopicAlkanes and AlkenesLevelGCSE Outcomes1.To compare and contrast alkenes with alkanes

Alkanes and Alkenes: teaching compare and contrast

Alkanes Alkenes Neither

Saturated Double bond Hydrocarbon Formed in cracking Very high melting point Extracted from crude oil Reacts with bromine water Renewable React with steam to produce ethanol Belong to a homologous series Have only single bonds Contains oxygen Has the molecular formula C 20 H 42 Carbon atoms only form 3 bonds Contains strong ionic bonds Covalently bonded Used as fuels Decolourises bromine water General formula C n H 2n React with oxygen to form carbon dioxide and water

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