plumiIntroduction: Edexcel International A Level Chemistry questions
Every Edexcel International A Level Chemistry exam question on 4A Introduction (specification points 4.1–4.8), 2019–2025, with its mark scheme and examiner’s report.
Paper
All papers
Exam
All years
Calculations
Q14(a)
The whole paper ↗Q14(b)
The whole paper ↗Your answerQ21(a)(ii)
The whole paper ↗Q19(a)
The whole paper ↗Q18(a)
The whole paper ↗- Your answer
Q21(c)(ii)
The whole paper ↗Q22(a)
The whole paper ↗- Your answer
Q17(e)(i)
The whole paper ↗- Your answer
Q2(a)
The whole paper ↗Q4(f)(i)
The whole paper ↗Q4(f)(ii)
The whole paper ↗Q22(e)(iii)
The whole paper ↗Q22(e)(iv)
The whole paper ↗- Your answer
Q8(a)
The whole paper ↗Your answer
All 25 questions on Introduction, as a list
- June 2025, AS Unit 1, Q14(a) (1 mark): Hairdressers use solutions of hydrogen peroxide that have these hazards: • can cause serious eye damage • is harmful if swallowed • is an oxidising agent Which
- June 2025, AS Unit 1, Q14(b) (1 mark): When hydrogen peroxide is used in an experiment to measure rate of decomposition, how could the risk be reduced? (I) using an alternative method that involves l
- January 2025, AS Unit 1, Q14 (1 mark): Which hazard warning symbol would be found on a bottle of hexane? A B C D
- January 2025, AS Unit 1, Q21(a)(ii) (2 marks): Explain why chloroethene and 1‑chloropropene are members of a homologous series. (2)
- June 2024, Unit 5, Q19(a) (1 mark): Identify the hazard symbol(s) that should be displayed on a box of liquitabs, using ticks (). (1)
- January 2024, AS Unit 1, Q18(a) (4 marks): Deduce a possible structure and name for each compound. (4) Possible structure of A Possible structure of B Name Name Possible structure of C Possible structure
- October 2023, AS Unit 1, Q17 (1 mark): A technician is asked to store four reagent bottles safely. The only information about each substance is the hazard label on the bottle. W X Y Z Based on the ha
- October 2023, AS Unit 2, Q21(c)(ii) (2 marks): Suggest why the production of propenoic acid from propane‑1,2,3‑triol is more sustainable than its production from propene. (2)
- June 2023, AS Unit 2, Q22(a) (1 mark): State one safety precaution that you should take when using a toilet cleaner containing hydrochloric acid. (1)
- January 2023, AS Unit 1, Q15 (1 mark): Prop‑2-en‑1‑ol is flammable, toxic and an environmental hazard. Which hazard symbols should be shown on its container? A B C D Use this space for any rough work
- January 2023, AS Unit 1, Q17 (1 mark): What is the name of a series such as the one shown? OH OH OH A addition B heterolytic C homologous D homolytic
- October 2022, AS Unit 1, Q17(e)(i) (2 marks): Suggest one advantage and one disadvantage of using liquid carbon dioxide rather than hexane to dissolve the limonene. Assume that the carbon dioxide does not e
- June 2022, AS Unit 1, Q13 (1 mark): When carrying out chemical experiments, the hazards and risks must be considered. For a given chemical A the hazard is fixed but the risk varies B the hazard va
- January 2022, Unit 6, Q2(a) (1 mark): State the molecular formula of X. (1)
- October 2021, Unit 6, Q4(f)(i) (1 mark): Deduce the formula of the alkyl group, R. (1)
- October 2021, Unit 6, Q4(f)(ii) (2 marks): Use your answer to (f)(i) to draw the structures of the four possible alcohols, ROH. (2)
- June 2021, AS Unit 2, Q22(e)(iii) (1 mark): Suggest a precaution that should be taken when opening a bottle of trichloromethane. (1)
- June 2021, AS Unit 2, Q22(e)(iv) (1 mark): Trichloromethane can be used as an anaesthetic. Suggest whether an old bottle of trichloromethane can still be used for medical treatment, giving a reason for y
- January 2021, AS Unit 1, Q13 (1 mark): A substance is labelled with the hazard symbol shown. What is the meaning of this symbol? A gloves must be worn B corrosive C do not store with flammable substa
- October 2020, AS Unit 1, Q8(a) (1 mark): What is the molecular formula for the fifth molecule in this sequence? (1) A CH4O B C6H11O C C6H14O D C7H16O
- October 2020, AS Unit 1, Q8(b) (1 mark): What is the name of this type of sequence? (1) A functional group B homologous series C homolytic series D skeletal formulae
- October 2020, AS Unit 1, Q19(d)(i) (2 marks): Some of the symbols shown are used for ammonium dichromate(VI). Identify the symbols for ammonium dichromate(VI) by placing a tick () in the box under each rel
- October 2020, AS Unit 1, Q19(d)(ii) (1 mark): Suggest why ammonium dichromate(VI) is not stored in the same cupboard as alkanes. (1)
- October 2020, Unit 5, Q13 (1 mark): Cuminone is used as a flavouring. O cuminone What is the molecular formula of cuminone? A C10H13O B C10H15O C C11H14O D C11H16O Use this space for any rough wor
- January 2020, AS Unit 1, Q21(c)(ii) (2 marks): One hazard symbol for 1,2-dichloroethane is shown. By identifying this hazard, give one way of minimising the risk when working with 1,2-dichloroethane in a lab
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