A-LevelChemistryHydrocarbons9701/12 · Feb/Mar 2022 · Q281 Mark
Alkenes react with aqueous hydrogen bromide. The reaction proceeds via an intermediate carbocation. The more stable the intermediate, the faster the reaction. Which sequence correctly shows an increase in the speed of reaction of the alkenes with hydrogen bromide?
Aethene, propene, 2-methylpropene
B2-methylpropene, ethene, propene
Cpropene, ethene, 2-methylpropene
Dpropene, 2-methylpropene, ethene
✓ Correct answer
A: ethene, propene, 2-methylpropene
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