plumiTypes of reaction and bond breaking: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 4.A.3 Types of reaction and bond breaking, 2019–2025, with mark schemes and examiner’s reports where available.
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Open the full PDFYour answerQ19(b)(ii)
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Open the full PDFYour answerQ10(b)
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Open the full PDFYour answerQ21(a)
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Open the full PDFQ22(b)(i)
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All 11 questions on Types of reaction and bond breaking, as a list
- October 2024, AS Unit 1, Q14 (1 mark): Polymerisation of alkenes occurs via a free radical mechanism. This reaction is started by the addition of small amounts of another compound. The structure of o
- January 2024, AS Unit 1, Q19(b)(ii) (2 marks): Using your answer to (b)(i), state what is meant by the terms homolytic and free radical. (2) homolytic free radical
- October 2022, AS Unit 1, Q7(b) (1 mark): One of the steps of the reaction is shown. C8H17• + Br2 → C8H17Br + Br• What is the name of this step and the type of bond breaking that takes place in the brom
- June 2022, AS Unit 1, Q14 (1 mark): Heterolytic fission produces A free radicals only B ions only C free radicals and positive ions only D free radicals and negative ions only Use this space for a
- January 2022, AS Unit 1, Q10(b) (1 mark): The ultraviolet radiation is needed for (1) A homolytic breaking of a Br–Br bond B heterolytic breaking of a Br–Br bond C homolytic breaking of a C–H bond D het
- October 2021, Unit 5, Q21(a) (1 mark): The equation shows the reaction between a free radical T• and curcumin (shown by a simplified structure). O O X X TH + H T O O curcumin Complete the left‑hand s
- October 2020, AS Unit 1, Q22(b)(i) (1 mark): State the essential condition necessary for this process. (1)
- October 2020, AS Unit 1, Q22(b)(ii) (2 marks): Write an equation for this fission in molecule X. Include curly half-arrows. (2)
- January 2020, AS Unit 1, Q21(f)(i) (1 mark): Classify the type of reaction occurring in Reaction 1. (1)
- June 2019, AS Unit 1, Q17 (1 mark): What type of bond breaking occurs in this process? H2O o H+ + OH− A electrophilic B heterolytic C homolytic D ionic Use this space for any rough working. Anythi
- January 2019, AS Unit 1, Q13 (1 mark): An electrophile A accepts a pair of electrons B always has a negative charge C always has a positive charge D donates a pair of electrons
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