Chemistry Topic Practice
Reactions of Alkenes | GCSE Chemistry Practice
Alkenes react with hydrogen, water, and halogens by addition across the double bond.
What product is formed when ethene reacts with steam in the presence of a catalyst?
What is Reactions of Alkenes | Practice?
"Chemical reactions where atoms are added to the carbon-carbon double bond of an alkene."
Addition Reactions
Hydrogenation: Alkene + Hydrogen → Alkane (uses nickel catalyst).
Hydration: Alkene + Steam → Alcohol (uses acid catalyst).
Halogenation: Alkene + Halogen → Dihaloalkane (e.g. ethene + bromine).
The $C=C$ double bond "opens up" to bond with new atoms.
Exam Tip
Functional Group: The $C=C$ double bond makes alkenes much more reactive than alkanes.
Want to improve faster?
The fastest way to improve your grade is to practise exam-style questions, identify your gaps, and focus only on what you don't know.
Start practising this topic
Instantly marked • No sign-up