O-LevelChemistryOrganic Chemistry5070/11 · May/June 2024 · Q391 Mark

The chromatogram shown is produced using a spot of black ink placed at point X. [Chromatogram showing chromatography paper, solvent front, baseline, point X, spot M, and scale in cm] Spot M is produced by a blue dye in the ink. What is the Rf value of this blue dye?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A0.22

B0.25

C0.33

D0.43

✓ Correct answer

C: 0.33

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 39.

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