Experimental design: past paper questions
Real questions on experimental design
The newest 20 of 132 written questions. Open one to see it on the real paper.
- 0971/32 · May/June 2026 · Q3b(i)[1]
(i) Use the graph in Figure 3.1 to determine the total volume of carbon dioxide gas released in 20s. total volume carbon dioxide .......... [1]
See it on the paper → - 0971/32 · May/June 2026 · Q3b(ii)[1]
(ii) Use the graph in Figure 3.1 to deduce the time taken for the reaction to finish. eect .......... [1]
See it on the paper → - 0971/32 · May/June 2026 · Q3b(iii)[2]
(iii) The student repeats the experiment using the same volume of dilute sulfuric acid but with smaller pieces of magnesium carbonate. Draw a line on the grid in Figure 3.1 to show how the total volume of carbon dioxide gas released changes over time in this second experiment. [2]
See it on the paper → - 0971/42 · May/June 2026 · Q3d(ii)[1]
(ii) Water is allowed to evaporate from solution A. Determine the volume of solution A when ZnSO, crystals first appear. VOIUMG .......... [1]
See it on the paper → - 0971/62 · May/June 2026 · Q1a[1]
Name the items of apparatus in Figure 1.1 labelled A and B.
See it on the paper → - 0971/62 · May/June 2026 · Q1b(i)[1]
(b) (i) Draw an arrow on Figure 1.1 to show where the apparatus should be heated. [1]
See it on the paper → - 0971/62 · May/June 2026 · Q1c[1]
Write a W on Figure 1.1 to show where water enters the apparatus labelled A.
See it on the paper → - 0971/62 · May/June 2026 · Q2b[1]
Complete a suitable scale on the y-axis and plot your results from Experiments 1 to 5 on Figure 2.2. Draw a line of best fit. volume of gas collected in 75 seconds /cm? 60 70 80 90 100 volume of distilled water /cm? Figure 2.2
See it on the paper → - 0971/62 · May/June 2026 · Q2e(ii)[1]
The volume of the dilute ethanoic acid can be measured using a 10cm® volumetric pipette. State one advantage of using a 10cm volumetric pipette rather than a 10cm° measuring cylinder to measure the volume of the dilute ethanoic acid.
See it on the paper → - 0971/62 · May/June 2026 · Q2f(i)[1]
State the effect, if any, the gas escaping has on the volume of gas collected in 75 seconds.
See it on the paper → - 0971/32 · October/November 2025 · Q1a[1]
is used as a lubricant
See it on the paper → - 0971/32 · October/November 2025 · Q8b(ii)[1]
the total volume of H 2 S produced when the reaction is complete.
See it on the paper → - 0971/62 · October/November 2025 · Q2d(ii)[1]
State why using 50 cm 3 of solution B would cause a problem when finding the volume of solution C needed to reach the second end-point in Experiment 1.
See it on the paper → - 0971/62 · October/November 2025 · Q2e[2]
A student repeats Experiment 2. The student warms solution B in the conical flask before carrying out the titration. State the effect, if any, on the volume of solution D required to reach the second end-point in Experiment 2. Explain your answer. explanation effect on volume of solution D
See it on the paper → - 0971/62 · October/November 2025 · Q2f[1]
State one change to the apparatus that will improve the accuracy of the results.
See it on the paper → - 0971/62 · October/November 2025 · Q4[6]
Liquid alcohols can be burned as fuels in spirit burners. The energy given out can be used to heat water in a boiling tube as shown in Fig. 4.1. thermometer boiling tube water spirit burner liquid alcohol Fig. 4.1 Describe how to investigate which of three liquid alcohols, ethanol, propanol and butanol, heats the water...
See it on the paper → - 0971/32 · May/June 2025 · Q8b[1]
Describe how to test whether a sample of water is pure using melting point.
See it on the paper → - 0971/61 · May/June 2025 · Q1b[1]
least concentrated solution (b) State which solution, aqueous potassium carbonate or dilute sulfuric acid, is the least concentrated. Give a reason for your answer.
See it on the paper → - 0971/61 · May/June 2025 · Q1c[1]
Name a piece of apparatus suitable for measuring the 25.0 cm 3 of aqueous potassium carbonate.
See it on the paper → - 0971/61 · May/June 2025 · Q1d[1]
Name a suitable indicator and give the colour change of this indicator at the end-point. indicator
See it on the paper →
What examiners said
Candidates had to correctly identify the least concentrated solution (aqueous potassium carbonate) and give a correct reason for their answer. The required reason was that the volume of aqueous potassium carbonate used was greater than the volume of dilute sulfuric acid. It was common for candidates to identify sulfuric acid as the least concentrated and then, as the reason, state the expected rea...
— Examiner report, May/June 2025, 0971/61 Q1(b) (Cambridge)
Almost all candidates could name an item of apparatus suitable for measuring 25.0 cm3 of aqueous potassium carbonate.
— Examiner report, May/June 2025, 0971/61 Q1(c) (Cambridge)
Most candidates were able to name a suitable acid-alkali indicator to use; the most popular choice being methyl orange. Those who chose thymolphthalein or phenolphthalein often had difficulty spelling the name. Credit was awarded if the indicator could be recognised; however, some attempts at spelling were such that the indicator could not be identified. It should be noted that universal indicator...
— Examiner report, May/June 2025, 0971/61 Q1(d) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.