OCR A Level Chemistry A
OCR A Level Chemistry A Alkanes and Alkenes Exam Questions
Free OCR A Level Chemistry A exam questions on Alkanes and Alkenes, with mark schemes. Covers alkane properties, radical substitution, alkene structure, E/Z isomerism, electrophilic addition and polymers.
Alkanes and Alkenes exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Chemistry A H432 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
From £10.99View flashcards
About OCR A Level Chemistry A Alkanes and Alkenes
This topic covers hydrocarbons.
What you need to know
- Alkanes Combustion and radical substitution.
- Alkenes Sigma and pi bonds, E/Z isomerism.
- Electrophilic addition Mechanisms with bromine and HBr, Markownikoff.
- Polymers Addition polymerisation and disposal.
Common mistakes in Alkanes and Alkenes
- Missing steps in radical mechanisms.
- Wrong E/Z assignments.
- Drawing polymer repeat units with double bonds.
Try three Alkanes and Alkenes exam-style questions
1. Name the three stages of radical substitution. (1 mark)
Show the mark scheme answer
Initiation, propagation, termination.
2. Explain why alkenes react with electrophiles. (1 mark)
Show the mark scheme answer
The pi bond is an area of high electron density.
3. State the test for an alkene. (1 mark)
Show the mark scheme answer
Bromine water decolourises.
Alkanes and Alkenes FAQs
What does this topic cover?
Alkanes, alkenes and polymers.
What is Markownikoff's rule?
The major product forms via the more stable carbocation.
Why are polymers hard to dispose of?
They are unreactive and non-biodegradable.
Revise this topic with flashcards: OCR A Level Chemistry A H432 Flashcards, with mark scheme answers for Anki and Quizlet.
