Question

In the chromatographic technique, the relative adsorption of a component in a mixture
expressed in terms of its $R_f$ value it is defined as:

• A. distance moved by solvent from baseline/distance moved by the substance from baseline
• B. amount adsorbed by a pure solvent/ amount adsorbed by the mixture
• C. distance moved by the substance from baseline/ distance moved by solvent from baseline
• D. amount absorbed per gram of stationary phase

Answer 1

Answer: (C)

distance moved by the substance from baseline/ distance moved by solvent from baseline

$R_f=\frac{\text{quality of the substance in mobile phase}}{\text{total quantity of the substance in system}}$
or
$R_f=\frac{\text{Distance moved by me substance from Baseline}}{\text{Distance moved by me solvent from Baseline}}$