$R_f$ values are used in paper chromatography to identify unknown substances. Which of the following statements about $R_f$ values are correct?
- A1 and 2
- B1 and 3
- C2 and 3
- D3 and 4
Chemistry 0620 · IGCSE · Chromatography
$R_f$ values are used in paper chromatography to identify unknown substances. Which of the following statements about $R_f$ values are correct?