Alkenes
Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond. These pages separate the topic into bonding, isomerism, electrophilic addition, reactions and polymer chemistry so that students can revise the structure and reactivity of alkenes clearly.
Revision Notes
Work through each part of Edexcel Topic 6 in a structured sequence.
Alkene Bonding
Revise the carbon-carbon double bond, including sigma and pi bonding, restricted rotation and the unsaturated nature of alkenes.
Start revisingGeometric Isomerism
Learn how restricted rotation around the C=C bond can produce E and Z stereoisomers when each carbon has two different groups.
Start revisingElectrophilic Addition Mechanism
Revise how electrophiles attack the electron-rich pi bond and how curly arrows show the formation of carbocation intermediates.
Start revisingReactions of Alkenes
Review the main addition reactions of alkenes, including reactions with hydrogen, steam, halogens and hydrogen halides.
Start revisingPolymerisation Reactions
Learn how alkene monomers join together by addition polymerisation to form long-chain polymers with repeating units.
Start revisingPolymer Waste
Revise the environmental problems caused by polymer waste and compare disposal, recycling and biodegradability issues.
Start revisingReaction Memory Game
& react
Reaction memory game: Alkenes
Turn the cards over two at a time: match reagents to what they make, and find how each product is made.
Play freeA free memory game on the reactions in this topic, with your board's reagents, conditions and spec points.
- Two ways to playMatch each set of reagents to what the reaction makes, or see a product and find the reactant and reagents that make it.
- Drawn the way the exam draws themEvery structure is drawn in ChemDraw, with the reagents and conditions your exam board asks for.
- It countsRounds earn XP and keep your streak going, and every correct match shows in your KASP analytics, apart from your marks.
Synthesis map
Download, print and revise the reactions of this topic at a glance.
Alkenes Map
Edexcel A Level Chemistry · Topic 6C Alkenes
Every reaction on one A4 page: reagents, conditions and reaction type for each arrow, colour coded, with the key tests.
© 2026 Online Learning System. For personal study: printing is allowed; editing, copying and redistribution are not.
Virtual Lessons
& learn
Virtual Lessons
Taught step by step in 4 recorded video lessons, to watch at your own pace.
See what is insideTopic 6C Alkenes taught by a specialist chemistry teacher, in 4 recorded video lessons that follow the specification.
- Learn it before you revise itEach lesson explains the chemistry step by step, with the diagrams, mechanisms and worked examples the exam expects.
- At your own pacePause, rewind and rewatch any part. Each lesson opens where you stopped.
- Your progress is keptA lesson is ticked off once you have watched most of it, here and in your course on Moodle.
Multiple Choice Question Exam Practice
yourself
Test yourself: 5 MCQ papers
Exam-style multiple-choice papers, marked the moment you submit with every answer explained. MCQ (A) is free.
Start MCQ (A) free5 exam-style multiple-choice papers, MCQ (A) to (E): 90 questions on Topic 6C Alkenes, written the way the exam asks them.
- Marked the moment you submitYour score straight away, with every answer explained, right or wrong.
- Revise what you missedEach explanation links to the revision notes for that point.
- MCQ (A) is freeTry the first paper now. MCQ (B) to (E) come with the course.
Exam Practice Questions
& draw
Written and drawn answers: 12 papers
Draw, write and calculate the way the exam asks, then a specialist chemistry teacher marks your work.
See what is inside12 exam papers, (A) to (L): 170 questions on Topic 6C Alkenes with no multiple choice. You write explanations, work out calculations and draw answers: structures, mechanisms and diagrams.
- Answer the way the exam asksThe real paper wants written, worked and drawn answers, so that is how you practise.
- Marked by a teacher, assisted by KASPA specialist chemistry teacher marks every answer against the mark scheme, with feedback on what to fix.
- One paper marked each weekYour marked paper comes back here with every marking point shown.
Specification
Alkenes – Edexcel A Level Chemistry
The following specification points outline the knowledge and skills students are expected to demonstrate for Topic 6.
6A: Introduction to organic chemistry
6C: Alkenes
Alkenes – Edexcel A Level Chemistry
The following specification points outline the knowledge and skills students are expected to demonstrate for Topic 6.
6A: Introduction to organic chemistry
6C: Alkenes
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