Question

Chromatography is the process for identification, purification and separation of components of a mixture on the basis of ____________

(a) Difference in their boiling point

(b) Difference in their melting point

(c) Difference in their affinity for mobile and stationary phase

(d) Difference in their solubility

The question was asked by my college director while I was bunking the class.

The doubt is from Chromatography topic in chapter Methods of Purification of Engineering Chemistry I

Answer 1

Right answer is (c) Difference in their affinity for mobile and stationary phase

To explain: Chromatography is the process for identification, purification and separation of components of a mixture on the basis of difference in their affinity for mobile and stationary phases. The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase.