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Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter

Ideal Gas Molecules

70 practice questions

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Practice questions

11–20 of 70

  1. Question 11

    1 mark · Normal

    Which statement best explains why liquids have a much higher density than gases?

    1. A.Particles in liquids are much closer together than in gases.
    2. B.Particles in liquids are moving faster than in gases.
    3. C.Particles in liquids are arranged in a regular pattern.
    4. D.Particles in liquids do not move.
    Answer and check →

  2. Question 12

    2 marks · Normal

    State the three main states of matter found on Earth and for each one give one property that distinguishes it from the other two.

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  3. Question 13

    3 marks · Normal

    Particle spacing and compressibility in different states
    StateHow close are particles?Easily compressed?
    SolidVery close togetherNo
    LiquidVery close togetherNo
    GasFar apartYes

    Use the table to compare and explain the reason for the compressibility of gases, solids and liquids.

    Answer and see the solution →

  4. Question 14

    2 marks · Normal

    Describe one similarity and one difference between the arrangement of particles in a liquid and a gas.

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  5. Question 15

    2 marks · Normal

    Why do particles in a solid only vibrate rather than move freely? Explain your answer in terms of the forces between the particles.

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  6. Question 16

    1 mark · Easy

    State what happens to the pressure of a fixed mass of gas if its volume is halved at constant temperature.

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  7. Question 17

    2 marks · Easy

    Explain, using the particle model, why the pressure of a gas increases if it is compressed into a smaller volume at constant temperature.

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  8. Question 18

    1 mark · Easy

    Which of the following statements about Boyle's law is correct?

    1. A.The pressure and temperature of a gas are inversely proportional at constant volume.
    2. B.The volume of a gas decreases as its pressure increases, at constant temperature.
    3. C.The volume of a gas increases as its pressure increases, at constant temperature.
    4. D.The mass of a gas must change for Boyle's law to apply.
    Answer and check →

  9. Question 19

    2 marks · Easy

    A balloon filled with gas is left in a warm room. Answer the following questions.

    (a)

    State what happens to the average kinetic energy of the gas molecules as the temperature of the room increases.

    [1 mark]
    (b)

    Explain how this affects the motion of the gas particles.

    [1 mark]
    Answer and see the solution →

  10. Question 20

    1 mark · Easy

    According to the particle model, what causes the pressure of a gas in a sealed container?

    Answer and see the solution →