Lesson 4.3.3.2

4.3.3.2 Pressure in gases (physics only) Quiz: AQA Physics, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.3.3.2, Pressure in gases (physics only): 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 3: Particle model of matter, written with Revision Ninja.

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The 20 questions

  1. At what angle does the net force from gas pressure act on a container wall?

    • At right angles
    • Opposite direction
    • At 45 degrees
    • Parallel

  2. What is the SI unit of pressure?

    • Pascal, Pa
    • Metre cubed, m3
    • Joule, J
    • Newton, N

  3. Which unit should volume be given in when using the equation p × V = constant?

    • Litres, L
    • Cubic centimetres, cm3
    • Metres cubed, m3
    • Square metres, m2

  4. What happens to the pressure of a fixed mass of gas when its volume doubles at constant temperature?

    • It doubles
    • It halves
    • Stays the same
    • It quadruples

  5. Why does gas pressure fall when container volume increases at constant temperature?

    • Fewer wall collisions
    • Lower particle speed
    • Fewer gas particles
    • Larger particle size

  6. A fixed mass of gas at constant temperature has pressure 100 kPa and volume 2.0 m³. What is its pressure when the volume is 4.0 m³?

    • 200 kPa
    • 400 kPa
    • 25 kPa
    • 50 kPa

  7. A gas has pressure 3.0 × 10⁵ Pa and volume 0.020 m³. It is compressed at constant temperature to 0.010 m³. What is the new pressure?

    • 1.2 × 10⁶ Pa
    • 6.0 × 10⁵ Pa
    • 1.5 × 10⁵ Pa
    • 3.0 × 10⁵ Pa

  8. Which equation describes a fixed mass of gas at constant temperature?

    • p + V = constant
    • p × V = constant
    • p / V = constant
    • p = V squared

  9. Why must temperature remain constant when investigating the pressure-volume relationship of a gas?

    • Changes container size
    • Alters particle speed
    • Stops gas escaping
    • Alters particle mass

  10. A gas at 200 kPa occupies 5.0 m³ at constant temperature. What volume gives a pressure of 500 kPa?

    • 12.5 m³
    • 0.40 m³
    • 2.0 m³
    • 1000 m³

  11. A gas has pressure 150 kPa at volume 0.60 m³. What is its pressure at 0.30 m³ with constant temperature?

    • 150 kPa
    • 75 kPa
    • 600 kPa
    • 300 kPa

  12. What happens to the pressure of trapped air when its volume is halved at constant temperature?

    • Stays the same
    • It halves
    • It quadruples
    • It doubles

  13. A gas is at 2 atm in a 3 L container. What volume gives 6 atm at constant temperature?

    • 9 L
    • 0.5 L
    • 1 L
    • 6 L

  14. Which change decreases the pressure of a fixed mass of gas at constant temperature?

    • Decreasing volume
    • Cooling the gas
    • Increasing volume
    • Adding more gas

  15. A 4.0 L sample of gas at 120 kPa expands to 10.0 L at constant temperature, then is compressed to 2.0 L. What is the final pressure?

    • 60 kPa
    • 120 kPa
    • 240 kPa
    • 480 kPa

  16. What is the shape of a pressure against inverse volume graph for a gas at constant temperature?

    • Horizontal line
    • Straight line through origin
    • U-shaped curve
    • Curved line downwards

  17. Why does compressing a gas increase its pressure?

    • Larger particles
    • More frequent wall collisions
    • Faster particles
    • Fewer wall collisions

  18. A fixed mass of gas has volume 8.0 m³ at 50 kPa. What is its pressure when its volume is 2.0 m³ at constant temperature?

    • 12.5 kPa
    • 200 kPa
    • 400 kPa
    • 50 kPa

  19. Which quantity must be multiplied by pressure to give a constant for a fixed mass of gas at constant temperature?

    • Density
    • Volume
    • Temperature
    • Mass

  20. A gas has volume 0.40 m³ at pressure 250 kPa. Its volume increases to 1.00 m³ at constant temperature. What is its new pressure?

    • 100 kPa
    • 250 kPa
    • 625 kPa
    • 10 kPa

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