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The particle model: OCR GCSE Combined Science A questions

Every OCR GCSE Combined Science A exam question on C1.1 The particle model, 2018–2025, with its mark scheme and examiner’s report.

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3,411 questions

  1. Q1

    June 2025 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  2. Q8

    June 2025 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  3. Q9

    June 2025 · Chemistry Paper 9 Higher

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  4. Q12(c)(iii)

    June 2025 · Chemistry Paper 9 Higher

    1 markC1.1 The particle model
    The whole paper ↗

  5. Q9

    June 2024 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  6. Q13(a)(ii)

    June 2024 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  7. Q1

    June 2024 · Chemistry Paper 9 Higher

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  8. Q12(a)

    June 2024 · Chemistry Paper 9 Higher

    3 marksC1.1 The particle model
    The whole paper ↗

  9. Q4

    June 2023 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  10. Q11(a)(i)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  11. Q11(a)(ii)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  12. Q11(a)(iii)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  13. Q11(b)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  14. Q10

    June 2023 · Chemistry Paper 9 Higher

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer

  15. Q11(c)(i)

    June 2022 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  16. Q14(a)

    November 2021 · Chemistry Paper 3 Foundation

    3 marksC1.1 The particle model
    The whole paper ↗

  17. Q14(b)

    November 2021 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  18. Q16(c)(i)

    November 2020 · Chemistry Paper 3 Foundation

    1 markC1.1 The particle model
    The whole paper ↗

  19. Q16(c)(ii)

    November 2020 · Chemistry Paper 3 Foundation

    2 marksC1.1 The particle model
    The whole paper ↗

  20. Q6

    November 2020 · Chemistry Paper 9 Higher

    1 markC1.1 The particle model
    The whole paper ↗
    Your answer
All 30 questions on The particle model, as a list
  1. June 2025, Chemistry Paper 3 Foundation, Q1 (1 mark): Which state of matter is shown in the diagram? A A gas B A liquid C A solid D A solution [1] Your answer
  2. June 2025, Chemistry Paper 3 Foundation, Q8 (1 mark): The table shows the boiling points of four substances made from simple molecules. Substance Boiling point (°C) A –196 B –33 C 36 D 98 Which substance has the we
  3. June 2025, Chemistry Paper 9 Higher, Q9 (1 mark): The particle model is used to describe changes of state. Which statement about the particle model is correct? A It takes into account the forces between particl
  4. June 2025, Chemistry Paper 9 Higher, Q12(c)(iii) (1 mark): Table 12.2 shows the melting point and boiling point of phosphorus trioxide. Table 12.2 Melting point (°C) Boiling point (°C) 24 173 In the box draw the particl
  5. June 2024, Chemistry Paper 3 Foundation, Q9 (1 mark): The diagram represents the particle model for a change in the arrangement of some particles. Which row describes this change? Type of change Explanation A chemi
  6. June 2024, Chemistry Paper 3 Foundation, Q13(a)(ii) (1 mark): The particle diagrams represent changes of state. Which diagram represents what happens in the boiling tube? Tick (3) one box. [1]
  7. June 2024, Chemistry Paper 9 Higher, Q1 (1 mark): The diagram represents the particle model for a change in the arrangement of some particles. Which row describes this change? Type of change Explanation A chemi
  8. June 2024, Chemistry Paper 9 Higher, Q12(a) (3 marks): Describe what happens when solid potassium bromide is heated up until it melts into a liquid. Use ideas about the particle model. [3]
  9. June 2023, Chemistry Paper 3 Foundation, Q4 (1 mark): Lead has a melting point of 328 °C. Mercury has a melting point of –39 °C. Which row describes the state of lead and mercury at 100 °C? State of lead State of m
  10. June 2023, Chemistry Paper 3 Foundation, Q11(a)(i) (1 mark): Complete Fig. 11.1 by drawing in the particles of the element when it is a gas. [1]
  11. June 2023, Chemistry Paper 3 Foundation, Q11(a)(ii) (1 mark): Describe how the particles of the element move in a solid. [1]
  12. June 2023, Chemistry Paper 3 Foundation, Q11(a)(iii) (1 mark): Name the change of state labelled X on Fig. 11.1. [1]
  13. June 2023, Chemistry Paper 3 Foundation, Q11(b) (1 mark): The table shows the state of the element chlorine at three different temperatures. State of chlorine Temperature (°C) solid –165 liquid –90 gas –20 Use the info
  14. June 2023, Chemistry Paper 9 Higher, Q10 (1 mark): The diagram shows the particle model for the condensation of a gas into a liquid. Which is a limitation of the particle model? A It does not show the arrangemen
  15. June 2022, Chemistry Paper 3 Foundation, Q11(c)(i) (1 mark): Which state symbol shows the physical state of nitrogen dioxide at –2 °C? Tick (✓) one box. g l s [1]
  16. November 2021, Chemistry Paper 3 Foundation, Q14(a) (3 marks): Look at the sentences, A–D. They describe sections 1, 2, 3 and 4 of the heating curve in Fig. 14.1. A Heat energy is used to break the forces between the partic
  17. November 2021, Chemistry Paper 3 Foundation, Q14(b) (1 mark): A student wants to produce the heating curve for ice. Fig. 14.2 shows the equipment the student uses. Thermometer Crushed ice Bunsen burner Fig. 14.2 The studen
  18. November 2020, Chemistry Paper 3 Foundation, Q16(c)(i) (1 mark): Suggest why the alcohol evaporates very quickly. [1]
  19. November 2020, Chemistry Paper 3 Foundation, Q16(c)(ii) (2 marks): As the alcohol evaporates, the skin starts to feel cold. Explain why. Use ideas about energy in your answer. .. [2]
  20. November 2020, Chemistry Paper 9 Higher, Q6 (1 mark): The particle model used to describe solids, liquids and gases has some limitations. Which of the following is not a limitation of the particle model? A The forc
  21. November 2020, Chemistry Paper 9 Higher, Q11(c)(i) (1 mark): Suggest why the alcohol evaporates very quickly. [1]
  22. November 2020, Chemistry Paper 9 Higher, Q11(c)(ii) (2 marks): As the alcohol evaporates, the skin starts to feel cold. Explain why. Use ideas about energy in your answer. [2]
  23. November 2020, Chemistry Paper 10 Higher, Q3 (1 mark): The table shows the melting and boiling points of bromine. Melting point (°C) Boiling point (°C) −7 59 Which change of state happens when bromine is cooled from
  24. June 2019, Chemistry Paper 3 Foundation, Q1 (1 mark): Which of these processes is an example of a physical change? A Combustion B Freezing C Neutralisation D Oxidation Your answer [1]
  25. June 2019, Chemistry Paper 3 Foundation, Q12(a)(i) (1 mark): What is the melting point of substance X? Melting point = °C [1]
  26. June 2019, Chemistry Paper 3 Foundation, Q12(a)(ii) (1 mark): What is the state of matter of substance X at 70 °C? Tick (✓) one box. Solid Liquid Gas [1]
  27. June 2019, Chemistry Paper 3 Foundation, Q12(b) (1 mark): In which state of matter do the particles of X have the most energy? Tick (✓) one box. Solid Liquid Gas [1]
  28. June 2019, Chemistry Paper 9 Higher, Q6 (1 mark): The particle model does not take into account certain information about the particles. Which of the following does the particle model take into account? A The s
  29. June 2018, Chemistry Paper 3 Foundation, Q19(c)(ii) (1 mark): The table shows the melting point and boiling point of H2S. Melting point –85.5 °C Boiling point –60.7 °C What state does H2S exist in at room temperature? [1]
  30. June 2018, Chemistry Paper 9 Higher, Q12(c)(ii) (1 mark): The table shows the melting point and boiling point of H2S. Melting point –85.5 °C Boiling point –60.7 °C What state does H2S exist in at room temperature? [1]

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