A food scientist investigates four food dyes, A, B, C and D. Each dye was tested in a separate chromatography run, using the same type of paper and the same solvent. The distances moved by each dye and by the solvent are shown below.
| Dye | Distance moved by dye | Distance moved by solvent |
|---|---|---|
| A | 18 mm | 60 mm |
| B | 14 mm | 40 mm |
| C | 24 mm | 60 mm |
| D | 27 mm | 45 mm |
Which dye spent the greatest proportion of the time held on the paper?
Dye B
Dye A
Dye D
Dye C
113 exam-style questions on AQA GCSE Chemistry 8.1 Purity, formulations and chromatography, covering 8.1.1 Pure substances, 8.1.2 Formulations, and 8.1.3 Chromatography. Each one has a worked solution and a mark scheme showing where the marks go.