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). This double bond is their functional group and is responsible for their high chemical reactivity compared to alkanes. The general formula for alkenes is CnH2ncap C sub n cap H sub 2 n end-sub Key Examples: Common alkenes include ethene ( C2H4cap C sub 2 cap H sub 4 ), propene ( C3H6cap C sub 3 cap H sub 6 ), and butene ( C4H8cap C sub 4 cap H sub 8

is a widely used chemistry worksheet focused on the fundamental properties and reactions of alkenes . For students preparing for AQA, Edexcel, or OCR exams, mastering this content is essential for understanding organic chemistry and the behavior of unsaturated hydrocarbons. Understanding Alkenes (GCSE 1232) chemsheets 1232 answers

While alkenes can burn, they often undergo incomplete combustion , resulting in a smoky flame due to unburnt carbon particles. Key Concepts for Exam Success For students preparing for AQA, Edexcel, or OCR

). The reaction with bromine water is a standard test for unsaturation: the orange-brown liquid turns . Reaction with Hydrogen (Hydrogenation): Adding H2cap H sub 2 The reaction with bromine water is a standard