0654.C12.4.01 — Describe and explain methods of separation and purification using: (a) . a suitable solvent (b) . filtration (c) . crystallisation (d) . sim: past paper questions
Real questions on 0654.c12.4.01 — describe and explain methods of separation and purification using: (a) . a suitable solvent (b) . filtration (c) . crystallisation (d) . sim
The newest 15 of 15 written questions. Open one to see it on the real paper.
- 0973/31 · May/June 2026 · Q5a[4]
Draw one line from each process to its description. process description a method used to separate an chromatography insoluble solid from water a method using a burette to mix diffusion an acid with an alkali a technique used to separate mixtures filtration of soluble coloured substances the result of the constant rando...
See it on the paper → - 0973/32 · May/June 2025 · Q8a(i)[1]
State the number of different elements shown in this formula. (i)
See it on the paper → - 0973/32 · May/June 2025 · Q8a(ii)[1]
State the total number of atoms shown in this formula.
See it on the paper → - 0973/31 · October/November 2024 · Q2c[1]
Magnesium chloride is soluble in water. State the separation technique used to obtain solid magnesium chloride from a solution of magnesium chloride.
See it on the paper → - 0973/31 · May/June 2023 · Q5a[3]
Substances are separated from mixtures of substances using different methods. Draw one straight line from each substance to the correct method of separating it from the mixture. One line has been drawn for you. substance separated from the mixture method of separation blue dye from black ink chromatography gas oil from...
See it on the paper → - 0973/31 · May/June 2023 · Q5b[1]
One reason for separating mixtures is to purify substances. Explain the importance of purity in the manufacture of substances used in food additives.
See it on the paper → - 0973/31 · May/June 2023 · Q11a(i)[2]
Explain how filter paper separates limestone from water.
See it on the paper → - 0973/32 · May/June 2022 · Q2b(iii)[1]
Some solid magnesium remains unreacted. State the method used to remove the unreacted solid magnesium from the reaction mixture.
See it on the paper → - 0973/32 · May/June 2020 · Q8d(i)[1]
State the method of separation shown in Fig. 8.3.
See it on the paper → - 0973/32 · May/June 2020 · Q8d(ii)[2]
Explain why water and sodium chloride can be separated using this method. Use ideas about the types of chemical bond in these compounds.
See it on the paper → - 0973/41 · May/June 2019 · Q11b[4]
Lead chloride is an insoluble salt. Describe a method of making solid lead chloride from reactants chosen from Table 11.1. Table 11.1 compound solubility in water calcium chloride soluble calcium nitrate soluble calcium sulfate insoluble lead carbonate insoluble lead nitrate soluble lead sulfate insoluble magnesium sul...
See it on the paper → - 0973/42 · May/June 2019 · Q5a(i)[1]
Name the process he uses to remove the solids from the cloudy green liquid to obtain a clear green solution.
See it on the paper → - 0973/42 · May/June 2019 · Q5a(ii)[1]
Describe how the process he uses produces a clear green solution.
See it on the paper → - 0973/42 · May/June 2019 · Q5b(i)[1]
Draw a line on Fig. 5.2 to show the surface of the solvent in the beaker.
See it on the paper → - 0973/42 · May/June 2019 · Q5b(iii)[3]
Describe how the student can obtain a pure, dry sample of the orange compound from the chromatogram.
See it on the paper →
What examiners said
Three was the most common answer, but answers in the range of 2–9 were commonly seen as suggestions. Some candidates stated two because it contained calcium and carbonate.
— Examiner report, May/June 2025, 0973/32 Q8(a)(i) (Cambridge)
This proved more challenging to candidates than 8(a)(i). 50 was a common incorrect answer, a result of adding up the masses of the atoms but many other figures were given.
— Examiner report, May/June 2025, 0973/32 Q8(a)(ii) (Cambridge)
Many candidates showed a good understanding of separation techniques and scored full marks.
— Examiner report, May/June 2023, 0973/31 Q5(a) (Cambridge)
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