plumiChromatography: Edexcel GCSE Combined Science questions
Every Edexcel GCSE Combined Science exam question on Chromatography (specification points 2.9–2.11), 2018–2025, with its mark scheme and examiner’s report.
Paper
All papers
Exam
All years
Calculations
Q2(c)(i)
The whole paper ↗Q2(c)(ii)
The whole paper ↗Q6(b)
The whole paper ↗Q1(a)(i)
The whole paper ↗Q1(a)(ii)
The whole paper ↗Q1(a)(iii)
The whole paper ↗Q3(b)(i)
The whole paper ↗Q3(b)(ii)
The whole paper ↗Q3(b)(iii)
The whole paper ↗Q2(c)(i)
The whole paper ↗Q2(c)(ii)
The whole paper ↗Q2(c)(iii)
The whole paper ↗Q4(a)
The whole paper ↗Your answer
All 13 questions on Chromatography, as a list
- June 2025, Chemistry Paper 1 Foundation, Q2(c)(i) (1 mark): Using the information in Figure 5, state which colour is made of only two food dyes. (1)
- June 2025, Chemistry Paper 1 Foundation, Q2(c)(ii) (3 marks): The Rf value of a spot on the chromatogram can be calculated using the equation distance moved by the food dye f = R distance moved by solvent front Using the i
- June 2023, Chemistry Paper 1 Higher, Q6(b) (2 marks): A scientist uses chromatography in an investigation of compound S. In the conditions used, compound S has an Rf value of 0.22. Calculate the distance the spot o
- June 2023, Chemistry Paper 1 Foundation, Q1(a)(i) (1 mark): The chromatogram shows that only one of the inks contains a single dye. Which ink contains a single dye? (1) A W B X C Y D Z
- June 2023, Chemistry Paper 1 Foundation, Q1(a)(ii) (1 mark): Which ink contains the greatest number of dyes? (1) A W B X C Y D Z
- June 2023, Chemistry Paper 1 Foundation, Q1(a)(iii) (2 marks): The Rf value of a dye can be calculated using the equation distance moved by the dye Rf = distance moved by solvent front At the end of the chromatography one d
- November 2020, Chemistry Paper 1 Higher, Q3(b)(i) (1 mark): In the experiment, the solvent front moved 6.5 cm. Calculate the Rf value of the dye that is present in both inks X and Z. (1) Rf =
- November 2020, Chemistry Paper 1 Higher, Q3(b)(ii) (1 mark): State what could be changed in the experiment to make the Rf value more accurate. (1)
- November 2020, Chemistry Paper 1 Higher, Q3(b)(iii) (2 marks): In this experiment, ink sample Y did not move from the start line. Explain a change to the experiment that would be needed to separate the dyes in ink sample Y.
- June 2019, Chemistry Paper 1 Foundation, Q2(c)(i) (2 marks): The steps needed to carry out the chromatography experiment are listed below. They are not in the correct order. 1 leave the solvent to rise up the paper 2 put
- June 2019, Chemistry Paper 1 Foundation, Q2(c)(ii) (2 marks): Explain, using Figure 4, which food colouring contains the greatest number of coloured substances. (2)
- June 2019, Chemistry Paper 1 Foundation, Q2(c)(iii) (2 marks): During chromatography of the food colourings, the solvent front moved 8.00 cm and the food colouring R moved 2.30 cm. Calculate the Rf value for food colouring
- June 2018, Chemistry Paper 1 Foundation, Q4(a) (1 mark): Which method is used to separate the coloured substances in the ink? (1) A chromatography B crystallisation C filtration D fractional distillation
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