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Identification of common gases: AQA GCSE Combined Science questions

Every AQA GCSE Combined Science exam question on 5.8.2 Identification of common gases, 2018–2025, with its mark scheme and examiner’s report.

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3,069 questions

  1. Q02.1

    June 2025 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2025 Chemistry Paper 2 Higher, question 02.1: About one-fifth of the atmosphere is oxygen. Describe the test for oxygen gas. Give the result of the test. [2 marks] Test Result

  2. Q05.5

    June 2025 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2025 Chemistry Paper 2 Higher, question 05.5: The equation for the reaction of magnesium with hydrochloric acid is: Mg + 2 HCl → MgCl2 + H2 Describe a test for the gas produced in the reaction. Give the res

  3. Q02.5

    June 2025 · Chemistry Paper 2 Foundation

    1 mark5.8.2 Identification of common gases
    The whole paper ↗
    June 2025 Chemistry Paper 2 Foundation, question 02.5: The gas produced during the investigation is carbon dioxide. The test for carbon dioxide uses limewater. What is the chemical name for limewater? [1 mark] Tick

  4. Q03.5

    June 2025 · Chemistry Paper 2 Foundation

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2025 Chemistry Paper 2 Foundation, question 03.5: Describe the test for hydrogen gas. Give the result of the test. [2 marks] Test Result

  5. Q06.1

    June 2025 · Chemistry Paper 2 Foundation

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2025 Chemistry Paper 2 Foundation, question 06.1: About one-fifth of the atmosphere is oxygen. Describe the test for oxygen gas. Give the result of the test. [2 marks] Test Result

  6. Q02.5

    June 2024 · Chemistry Paper 2 Foundation

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2024 Chemistry Paper 2 Foundation, question 02.5: Chlorine is a gas. Describe the test for chlorine. Give the result. [2 marks] Test Result

  7. Q03.4

    June 2023 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2023 Chemistry Paper 2 Higher, question 03.4: An equation for cracking decane (C10H22) is: C10H22(l) → C10H20(l) + H2(g) Describe a test to identify the gas produced in the reaction. [2 marks] Test Result

  8. Q04.6

    June 2023 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2023 Chemistry Paper 2 Higher, question 04.6: Describe a test to identify the gas used to sterilise water. [2 marks] Test Result

  9. Q06.1

    June 2023 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2023 Chemistry Paper 2 Higher, question 06.1: The equation for the decomposition of hydrogen peroxide is: 2 H2O2 → 2 H2O + O2 Describe a test to identify the gas produced in the reaction. [2 marks] Test Res

  10. Q01.6

    June 2023 · Chemistry Paper 2 Foundation

    1 mark5.8.2 Identification of common gases
    The whole paper ↗
    June 2023 Chemistry Paper 2 Foundation, question 01.6: Hydrogen gas is a product of cracking. What is used in the test for hydrogen gas? [1 mark] Tick () one box. Burning splint Glowing splint Limewater

  11. Q03.6

    June 2023 · Chemistry Paper 2 Foundation

    1 mark5.8.2 Identification of common gases
    The whole paper ↗
    June 2023 Chemistry Paper 2 Foundation, question 03.6: The test for chlorine uses damp litmus paper. Complete the sentence. Choose the answer from the box. [1 mark] blue green white When damp litmus paper is put int

  12. Q01.2

    June 2022 · Chemistry Paper 2 Foundation

    1 mark5.8.2 Identification of common gases
    The whole paper ↗
    June 2022 Chemistry Paper 2 Foundation, question 01.2: What is used to test for oxygen gas? [1 mark] Tick () one box. A burning splint A glowing splint Damp litmus paper Limewater

  13. Q06.1

    November 2021 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    November 2021 Chemistry Paper 2 Higher, question 06.1: Nitrogen is obtained from the air. The mixture of nitrogen and hydrogen must not contain carbon dioxide and oxygen. Explain how a sample can be tested to show t

  14. Q02.7

    November 2021 · Chemistry Paper 2 Foundation

    1 mark5.8.2 Identification of common gases
    The whole paper ↗
    November 2021 Chemistry Paper 2 Foundation, question 02.7: Emissions from cars that burn fossil fuels contain carbon dioxide. What is used to test for carbon dioxide? [1 mark] Tick () one box. Burning splint Glowing sp

  15. Q01.2

    November 2020 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    November 2020 Chemistry Paper 2 Higher, question 01.2: Describe the test for carbon dioxide. Give the result of the test. [2 marks] Test Result

  16. Q01.4

    November 2020 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    November 2020 Chemistry Paper 2 Higher, question 01.4: Describe the test for hydrogen. Give the result of the test. [2 marks] Test Result

  17. Q06.2

    November 2020 · Chemistry Paper 2 Foundation

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    November 2020 Chemistry Paper 2 Foundation, question 06.2: Describe the test for carbon dioxide. Give the result of the test. [2 marks] Test Result

  18. Q06.4

    November 2020 · Chemistry Paper 2 Foundation

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    November 2020 Chemistry Paper 2 Foundation, question 06.4: Describe the test for hydrogen. Give the result of the test. [2 marks] Test Result

  19. Q06.1

    June 2019 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2019 Chemistry Paper 2 Higher, question 06.1: Give the test and result for oxygen gas. [2 marks] Test Result

  20. Q06.1

    June 2018 · Chemistry Paper 2 Higher

    2 marks5.8.2 Identification of common gases
    The whole paper ↗
    June 2018 Chemistry Paper 2 Higher, question 06.1: Give the test and result for chlorine gas. [2 marks]
All 20 questions on Identification of common gases, as a list
  1. June 2025, Chemistry Paper 2 Higher, Q02.1 (2 marks): About one-fifth of the atmosphere is oxygen. Describe the test for oxygen gas. Give the result of the test. [2 marks] Test Result
  2. June 2025, Chemistry Paper 2 Higher, Q05.5 (2 marks): The equation for the reaction of magnesium with hydrochloric acid is: Mg + 2 HCl → MgCl2 + H2 Describe a test for the gas produced in the reaction. Give the res
  3. June 2025, Chemistry Paper 2 Foundation, Q02.5 (1 mark): The gas produced during the investigation is carbon dioxide. The test for carbon dioxide uses limewater. What is the chemical name for limewater? [1 mark] Tick
  4. June 2025, Chemistry Paper 2 Foundation, Q03.5 (2 marks): Describe the test for hydrogen gas. Give the result of the test. [2 marks] Test Result
  5. June 2025, Chemistry Paper 2 Foundation, Q06.1 (2 marks): About one-fifth of the atmosphere is oxygen. Describe the test for oxygen gas. Give the result of the test. [2 marks] Test Result
  6. June 2024, Chemistry Paper 2 Foundation, Q02.5 (2 marks): Chlorine is a gas. Describe the test for chlorine. Give the result. [2 marks] Test Result
  7. June 2023, Chemistry Paper 2 Higher, Q03.4 (2 marks): An equation for cracking decane (C10H22) is: C10H22(l) → C10H20(l) + H2(g) Describe a test to identify the gas produced in the reaction. [2 marks] Test Result
  8. June 2023, Chemistry Paper 2 Higher, Q04.6 (2 marks): Describe a test to identify the gas used to sterilise water. [2 marks] Test Result
  9. June 2023, Chemistry Paper 2 Higher, Q06.1 (2 marks): The equation for the decomposition of hydrogen peroxide is: 2 H2O2 → 2 H2O + O2 Describe a test to identify the gas produced in the reaction. [2 marks] Test Res
  10. June 2023, Chemistry Paper 2 Foundation, Q01.6 (1 mark): Hydrogen gas is a product of cracking. What is used in the test for hydrogen gas? [1 mark] Tick () one box. Burning splint Glowing splint Limewater
  11. June 2023, Chemistry Paper 2 Foundation, Q03.6 (1 mark): The test for chlorine uses damp litmus paper. Complete the sentence. Choose the answer from the box. [1 mark] blue green white When damp litmus paper is put int
  12. June 2022, Chemistry Paper 2 Foundation, Q01.2 (1 mark): What is used to test for oxygen gas? [1 mark] Tick () one box. A burning splint A glowing splint Damp litmus paper Limewater
  13. November 2021, Chemistry Paper 2 Higher, Q06.1 (2 marks): Nitrogen is obtained from the air. The mixture of nitrogen and hydrogen must not contain carbon dioxide and oxygen. Explain how a sample can be tested to show t
  14. November 2021, Chemistry Paper 2 Foundation, Q02.7 (1 mark): Emissions from cars that burn fossil fuels contain carbon dioxide. What is used to test for carbon dioxide? [1 mark] Tick () one box. Burning splint Glowing sp
  15. November 2020, Chemistry Paper 2 Higher, Q01.2 (2 marks): Describe the test for carbon dioxide. Give the result of the test. [2 marks] Test Result
  16. November 2020, Chemistry Paper 2 Higher, Q01.4 (2 marks): Describe the test for hydrogen. Give the result of the test. [2 marks] Test Result
  17. November 2020, Chemistry Paper 2 Foundation, Q06.2 (2 marks): Describe the test for carbon dioxide. Give the result of the test. [2 marks] Test Result
  18. November 2020, Chemistry Paper 2 Foundation, Q06.4 (2 marks): Describe the test for hydrogen. Give the result of the test. [2 marks] Test Result
  19. June 2019, Chemistry Paper 2 Higher, Q06.1 (2 marks): Give the test and result for oxygen gas. [2 marks] Test Result
  20. June 2018, Chemistry Paper 2 Higher, Q06.1 (2 marks): Give the test and result for chlorine gas. [2 marks]

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