Butene, CH2=CHCH2CH3\mathrm{CH_{2}{=}CHCH_{2}CH_{3}}CH2=CHCH2CH3, reacts with bromine, Br2\mathrm{Br_{2}}Br2.
What is the product of this reaction?
CH2BrCH2CH2CH3\mathrm{CH_{2}BrCH_{2}CH_{2}CH_{3}}CH2BrCH2CH2CH3
CH2=CBrCH2CH3\mathrm{CH_{2}{=}CBrCH_{2}CH_{3}}CH2=CBrCH2CH3
CH3CHBrCHBrCH3\mathrm{CH_{3}CHBrCHBrCH_{3}}CH3CHBrCHBrCH3
CH2BrCHBrCH2CH3\mathrm{CH_{2}BrCHBrCH_{2}CH_{3}}CH2BrCHBrCH2CH3
63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.