Question

What is Rf value?

(a) Ratio of the distance moved by the solvent and the distance moved by the solute

(b) Ratio of the distance moved by the solute and the distance moved by the solvent

(c) Ratio of the concentration of solute and the concentration of the solvent

(d) It Ratio of the concentration of solvent and the concentration of the solute

This question was posed to me in a job interview.

This intriguing question comes from Absorption Mechanisms in section Absorption of Food Processing Unit Operations

Answer 1

The correct choice is (b) Ratio of the distance moved by the solute and the distance moved by the solvent

The best explanation: The Rf value is defined as the ratio of the distance moved by the solute and the distance moved by the solvent along the paper, where both distances are measured from the common application Baseline.