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Chromatography past paper questions

O Level Chemistry 5070 · Experimental techniques and chemical analysis. 1 Describe how paper chromatography is used to separate mixtures of soluble substances, using a suitable solvent 2 Describe the use of locating agents when separating mixtures containing colourless substances. Knowledge of specific locating agents is not required 3 Interpret simple chromatograms to identify: (a) unknown substances by comparison with known substances (b) pure and impure substances 4 State and use the equation for Rf: Rf = distance travelled by substance distance travelled by solvent

In Cambridge O Level Chemistry 5070, Chromatography came up in 16 of the 72 papers on Paperstreak, for about 2 marks a paper when it does. It last came up in October/November 2025.

16 questions, newest first

1. 5070/11/O/N/25 Question 38 · 1 mark
2. 5070/12/M/J/25 Question 37 · 1 mark
3. 5070/11/O/N/24 Question 39 · 1 mark
4. 5070/11/M/J/24 Question 39 · 1 mark
5. 5070/12/O/N/23 Question 39 · 1 mark
6. 5070/11/M/J/23 Question 39 · 1 mark
7. 5070/12/M/J/23 Question 39 · 1 mark
8. 5070/41/M/J/23 Question 1 · 6 marks
9. 5070/11/O/N/21 Question 4 · 1 mark
10. 5070/11/O/N/20 Question 3 · 1 mark
11. 5070/12/O/N/20 Question 3 · 1 mark
12. 5070/41/O/N/20 Question 1 · 5 marks
13. 5070/11/M/J/20 Question 3 · 1 mark
14. 5070/12/M/J/20 Question 3 · 1 mark
15. 5070/41/M/J/20 Question 5 parts (a(i)) (a(ii)) (a(iii)) (a(iv)) (b(i)) (b(ii)) (b(iii)) (b(iv)) · 12 marks
16. 5070/42/M/J/20 Question 3 part (b(ii)) · 3 marks

More in Experimental techniques and chemical analysis: Experimental design, Acid–base titrations, Separation and purification, Identification of ions and gases.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.