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The wider impact of chemistry: WJEC A‑Level Chemistry questions

Every WJEC A-Level Chemistry exam question on 2.3 The wider impact of chemistry, 2016–2025, with its mark scheme and examiner’s report.

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1,204 questions

  1. Q6(d)(i)

    Summer 2025 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2025 Unit 4, question 6(d)(i): Calculate the atom economy of this reaction. [2] Atom economy = %

  2. Q8(c)(iii)

    Summer 2025 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2025 Unit 4, question 8(c)(iii): Although L-dopa is used extensively in many countries in the treatment of Parkinson’s disease, it remains too expensive to use in some developing countries. Sci

  3. Q6

    Summer 2024 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2024 Unit 4, question 6: Ethanal is oxidised by selenium dioxide giving ethanedial. H H CH3CHO + SeO2 C C + Se + H2O O O Calculate the atom economy of this reaction to produce ethanedia

  4. Q9(a)(ii)

    Summer 2024 · Unit 4

    1 mark2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2024 Unit 4, question 9(a)(ii): Suggest one reason why this stage of the process may be seen as relatively uneconomic. [1]

  5. Q10(b)(ii)

    Summer 2024 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2024 Unit 4, question 10(b)(ii): There is interest in producing materials by ‘green’ methods. Two methods are proposed for making sucrose octaethanoate in the laboratory. Method X Refluxing the

  6. Q8

    Summer 2023 · AS Unit 2

    6 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2023 AS Unit 2, question 8: The use of biofuels has been proposed as the way to ensure the sustainability of energy production in the future. Discuss the extent to which you agree with thi

  7. Q11(b)(i)

    Summer 2022 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2022 Unit 4, question 11(b)(i): Calculate the atom economy for the production of calcium butane-1,4-dioate. [2] Atom economy = %

  8. Q9(b)(i)

    Summer 2019 · Unit 4

    1 mark2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2019 Unit 4, question 9(b)(i): Suggest one reason why the general public would probably favour the production of propenal by Method 2 [1]

  9. Q9(b)(ii)

    Summer 2019 · Unit 4

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2019 Unit 4, question 9(b)(ii): If you were considering which of these two methods to choose to produce propenal, state two other factors, apart from cost, that you would need to know to be ab

  10. Q8(b)(iv)

    Summer 2019 · AS Unit 2

    2 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2019 AS Unit 2, question 8(b)(iv): Describe the environmental implications on the atmosphere if the reaction above occurs on a large scale. [2]

  11. Q13(a)

    Summer 2018 · AS Unit 2

    3 marks2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2018 AS Unit 2, question 13(a): Explain what is meant by a carbon-neutral fuel. [3]

  12. Q11(a)(iii)

    Summer 2017 · AS Unit 2

    2 marks2.3 The wider impact of chemistry2.7 Alcohols and carboxylic acids
    The whole paper ↗
    Summer 2017 AS Unit 2, question 11(a)(iii): Ethanol can also be made by the hydration of ethene. Describe one environmental consideration in choosing between fermentation and hydration as methods for etha

  13. Q8(b)

    Summer 2016 · AS Unit 2

    6 marks2.1 Thermochemistry2.3 The wider impact of chemistry
    The whole paper ↗
    Summer 2016 AS Unit 2, question 8(b): Charcoal consists mainly of carbon. It has been produced for many centuries by heating wood in the absence of oxygen. Natural gas consists mainly of methane and
All 13 questions on The wider impact of chemistry, as a list
  1. Summer 2025, Unit 4, Q6(d)(i) (2 marks): Calculate the atom economy of this reaction. [2] Atom economy = %
  2. Summer 2025, Unit 4, Q8(c)(iii) (2 marks): Although L-dopa is used extensively in many countries in the treatment of Parkinson’s disease, it remains too expensive to use in some developing countries. Sci
  3. Summer 2024, Unit 4, Q6 (2 marks): Ethanal is oxidised by selenium dioxide giving ethanedial. H H CH3CHO + SeO2 C C + Se + H2O O O Calculate the atom economy of this reaction to produce ethanedia
  4. Summer 2024, Unit 4, Q9(a)(ii) (1 mark): Suggest one reason why this stage of the process may be seen as relatively uneconomic. [1]
  5. Summer 2024, Unit 4, Q10(b)(ii) (2 marks): There is interest in producing materials by ‘green’ methods. Two methods are proposed for making sucrose octaethanoate in the laboratory. Method X Refluxing the
  6. Summer 2023, AS Unit 2, Q8 (6 marks): The use of biofuels has been proposed as the way to ensure the sustainability of energy production in the future. Discuss the extent to which you agree with thi
  7. Summer 2022, Unit 4, Q11(b)(i) (2 marks): Calculate the atom economy for the production of calcium butane-1,4-dioate. [2] Atom economy = %
  8. Summer 2019, Unit 4, Q9(b)(i) (1 mark): Suggest one reason why the general public would probably favour the production of propenal by Method 2 [1]
  9. Summer 2019, Unit 4, Q9(b)(ii) (2 marks): If you were considering which of these two methods to choose to produce propenal, state two other factors, apart from cost, that you would need to know to be ab
  10. Summer 2019, AS Unit 2, Q8(b)(iv) (2 marks): Describe the environmental implications on the atmosphere if the reaction above occurs on a large scale. [2]
  11. Summer 2018, AS Unit 2, Q13(a) (3 marks): Explain what is meant by a carbon-neutral fuel. [3]
  12. Summer 2017, AS Unit 2, Q11(a)(iii) (2 marks): Ethanol can also be made by the hydration of ethene. Describe one environmental consideration in choosing between fermentation and hydration as methods for etha
  13. Summer 2016, AS Unit 2, Q8(b) (6 marks): Charcoal consists mainly of carbon. It has been produced for many centuries by heating wood in the absence of oxygen. Natural gas consists mainly of methane and

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