Chemistry 0620 · IGCSE · Chromatography

Chromatography — practice question

The chromatogram for substance S is displayed. Distances W, X, Y and Z are marked on the diagram. How is the $R_f$ value of substance S determined?

  • A$\dfrac{X}{Y}$
  • B$\dfrac{W}{Z}$
  • C$\dfrac{Y}{X}$
  • D$\dfrac{Y}{W}$

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