plumiHazard, risk and working safely: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 4.A.1 Hazard, risk and working safely, 2019–2025, with mark schemes and examiner’s reports where available.
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Q14(a)
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All 36 questions on Hazard, risk and working safely, 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
- June 2025, Unit 6, Q4(a) (1 mark): State the main safety precaution, other than wearing safety spectacles and a laboratory coat, that should be taken when weighing the phenol in Step 1. (1)
- June 2025, Unit 6, Q4(b) (1 mark): Give one reason why Step 2 must be performed in a fume cupboard. (1)
- 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, Unit 6, Q2(d) (3 marks): The hazard symbols present on the reagent bottle containing phenylamine are shown. State three precautions, other than wearing safety glasses and a laboratory c
- October 2024, AS Unit 3, Q4(d)(i) (1 mark): Draw the hazard symbol that should be displayed on the bottle of hydrogen peroxide. (1)
- October 2024, AS Unit 3, Q4(d)(ii) (1 mark): State one safety precaution that should be taken when using the hydrogen peroxide, other than wearing a lab coat and safety spectacles. (1)
- October 2024, AS Unit 3, Q4(d)(iii) (1 mark): The risk of harm to students needs to be reduced before they carry out this experiment in class. Suggest another control measure to reduce the risk for students
- October 2024, AS Unit 3, Q4(d)(iv) (1 mark): Give a reason why, during the experiment, the measuring cylinders should be placed in a tray. (1)
- October 2024, Unit 6, Q4(a) (2 marks): Phenylamine, used in Reaction 1, is labelled with the following hazard symbols. State the meaning of each symbol. (2)
- June 2024, AS Unit 3, Q3(a)(ii) (2 marks): The 3‑way tap can be used to prevent more chlorine gas from entering the equilibrium system. Identify Q and state why it is necessary. (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)
- June 2024, Unit 6, Q5(a)(ii) (1 mark): Containers of ammonia gas have the following hazard warning signs. State these two hazards associated with ammonia. (1)
- June 2024, Unit 6, Q5(a)(iii) (1 mark): Give a precaution to reduce the risk when carrying out Steps 3 and 4. It is assumed that safety goggles and a laboratory coat are used. (1)
- 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 3, Q3(a)(i) (1 mark): Complete the table by identifying the hazards. (1)
- October 2023, AS Unit 3, Q3(a)(ii) (2 marks): For each compound, state one way in which the risk due to the hazard shown could be reduced when carrying out this preparation. (2) Cyclohexanol Cyclohexene
- 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
- 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
- October 2022, AS Unit 3, Q3(d) (1 mark): The metal nitrate is toxic. Draw the hazard symbol that should be displayed on the bottle. (1)
- 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, AS Unit 2, Q23(a)(i) (1 mark): State why the thermal decomposition of magnesium ethanedioate should be carried out in a fume cupboard. (1)
- January 2022, AS Unit 3, Q4(b)(i) (2 marks): Identify the main hazard related to chlorine gas, giving the best way of minimising the risk when using this gas. (2)
- January 2022, Unit 6, Q4(a) (2 marks): This question is about the preparation of phenylamine by the reduction of nitrobenzene. NH2 NO2 + 6[H] → + 2H2O phenylamine nitrobenzene Outline procedure Step
- October 2021, AS Unit 3, Q2(d)(i) (2 marks): Complete the table to identify the hazards indicated by the symbols. (2)
- October 2021, AS Unit 3, Q2(d)(ii) (1 mark): State one precaution, other than wearing safety spectacles and a laboratory coat, that should be taken when using pure geraniol to reduce the risk associated wi
- 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
- June 2021, AS Unit 3, Q3(c) (1 mark): Solid samples of soluble barium compounds such as barium oxide are toxic by inhalation due to the presence of barium ions. Give a safety precaution that should
- June 2021, AS Unit 3, Q3(d) (1 mark): Barium also forms a peroxide. A bottle of barium peroxide has the hazard symbol Give the meaning of this symbol. (1)
- 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
- January 2021, AS Unit 3, Q4(a)(i) (2 marks): The concentrated hydrochloric acid used in Step 1 was labelled Suggest two safety precautions, other than wearing safety spectacles and a laboratory coat, to mi
- 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)
- 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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