0653.B3.1.01 — Describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.: past paper questions
Real questions on 0653.b3.1.01 — describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.
The newest 17 of 17 written questions. Open one to see it on the real paper.
- 0653/01 · Specimen 2025 · Q1[1]
Which word describes an action by an organism that causes a change of position or place?
See it on the paper → - 0653/01 · Specimen 2025 · Q6[1]
Which diagram shows the result?
See it on the paper → - 0653/31 · October/November 2025 · Q1b(i)[2]
Complete the sentence to describe diffusion. Diffusion is the movement of particles from a region of their higher concentration to a region of their
See it on the paper → - 0653/61 · October/November 2025 · Q1c[1]
All of the potato cylinders in step 2 are cut to have the same length of 5 cm. Explain why this helps to make the test fair.
See it on the paper → - 0653/61 · October/November 2025 · Q1d(i)[1]
Describe one difficulty in measuring the height of the foam in (a).
See it on the paper → - 0653/61 · October/November 2025 · Q1d(ii)[1]
Suggest one other reason why measuring the volume of oxygen produced is a more accurate method than measuring the height of the foam.
See it on the paper → - 0653/61 · October/November 2025 · Q1d(iii)[2]
Complete Fig. 1.3 to show assembled apparatus suitable for collecting and measuring the volume of oxygen produced. Label the apparatus. boiling tube (iii)
See it on the paper → - 0653/61 · October/November 2025 · Q2a[2]
114.96 g 115.04 g mass at step 2 mass at step 4 (a) Fig. 2.2 shows the balance readings for step 2 and step 4. Fig. 2.2 Record in Table 2.1 these masses to the nearest 0.1 g. mass of flask and its contents at step 2 / g mass of flask and its contents after mixing at step 4 / g observations at step 5 white precipitate T...
See it on the paper → - 0653/61 · October/November 2025 · Q2b[1]
Name a piece of apparatus suitable for measuring 25.0 cm 3 of aqueous H.
See it on the paper → - 0653/61 · October/November 2025 · Q2c[1]
“In a chemical reaction, no mass is gained or lost.” Explain whether your results in Table 2.1 support this statement. (c) A teacher states:
See it on the paper → - 0653/61 · October/November 2025 · Q2d[1]
Identify one ion present in aqueous H. Explain your answer. ion explanation
See it on the paper → - 0653/61 · October/November 2025 · Q2e[2]
Suggest why this procedure is not used to investigate the reaction between aqueous sodium carbonate and dilute hydrochloric acid. Explain your answer.
See it on the paper → - 0653/61 · October/November 2025 · Q3[7]
Solid citric acid is added to aqueous sodium hydrogencarbonate. There is a reaction and the temperature of the aqueous sodium hydrogencarbonate decreases. Plan an investigation to determine the relationship between the mass of citric acid added to the aqueous sodium hydrogencarbonate and the decrease in temperature. Yo...
See it on the paper → - 0653/61 · October/November 2025 · Q4a(i)[1]
Record d 0 in cm to the nearest 0.1 cm. d 0 = cm
See it on the paper → - 0653/61 · October/November 2025 · Q4a(ii)[2]
Another student suggests replacing crocodile clip C with the piece of apparatus shown in Fig. 4.3. Fig. 4.3 Explain why this is an improvement to the apparatus.
See it on the paper → - 0653/43 · May/June 2025 · Q3a(ii)[2]
Alveoli are the gas exchange surface in humans. Describe two features of the gas exchange surface in humans.
See it on the paper → - 0653/33 · October/November 2022 · Q7d(i)[2]
Complete this sentence about diffusion. Diffusion is the net movement of particles down a gradient as a result of their movement.
See it on the paper →
What examiners said
Some candidates gained full credit for describing features of gas exchange surfaces. Other candidates often got partial credit for knowing that they have a large surface area, are thin, or have a good supply of blood.
— Examiner report, May/June 2025, 0653/43 Q3(a)(ii) (Cambridge)
The sentence about diffusion was answered well by only a few candidates. Some candidates correctly completed concentration gradient. The random movement of the particles was not stated by many candidates.
— Examiner report, October/November 2022, 0653/33 Q7(d)(i) (Cambridge)
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