0654.C1.2.01 — Describe and explain diffusion in terms of kinetic particle theory: past paper questions
Real questions on 0654.c1.2.01 — describe and explain diffusion in terms of kinetic particle theory
The newest 5 of 5 written questions. Open one to see it on the real paper.
- 0973/41 · May/June 2025 · Q11a(i)[3]
Describe one similarity and two differences between boiling and evaporation. similarity difference difference
See it on the paper → - 0973/41 · May/June 2025 · Q11a(ii)[3]
State three factors which increase the rate of evaporation.
See it on the paper → - 0973/41 · October/November 2023 · Q6d[3]
When suspended in water, the pollen from the flower can be used to study Brownian motion. Describe how Brownian motion provides evidence for the kinetic molecular model of matter.
See it on the paper → - 0973/31 · May/June 2023 · Q9b(i)[2]
Complete the diagrams in Fig. 9.3 to show the arrangement and separation of molecules in a liquid and in a gas. liquid gas
See it on the paper → - 0973/41 · May/June 2022 · Q9a[2]
The student observes that the smoke particles move in straight lines between random changes of direction. Fig. 9.1 shows the observed path of one smoke particle. smoke particle Fig. 9.1 The motion shown in Fig. 9.1 is known as Brownian motion. Describe what causes the motion of the smoke particles shown in Fig. 9.1.
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What examiners said
Some candidates were able to explain similarities and differences between boiling and evaporation. Marks were often missed as candidates just made a statement about one of the processes and did not describe the difference. The most common correct ideas where that they both involve a liquid changing to a gas, and that boiling produces bubbles and evaporation does not.
— Examiner report, May/June 2025, 0973/41 Q11(a)(i) (Cambridge)
Most candidates identified a factor that would change the rate of evaporation, but many did not clarify how this factor would need to change to increase the rate of evaporation. Basic responses of temperature and surface area were commonly seen, but the qualification that these would need to increase was often omitted.
— Examiner report, May/June 2025, 0973/41 Q11(a)(ii) (Cambridge)
Many candidates did not attempt this question. Some candidates did not describe how Brownian motion provides evidence for the kinetic molecular model of matter but just described what happens to pollen when suspended in water. Many answers given by candidates were just simple descriptions about pollen moving on the surface of water. Other candidates confused Brownian motion with diffusion or wrote...
— Examiner report, October/November 2023, 0973/41 Q6(d) (Cambridge)
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