Which of the following best describes the mechanism of pigment separation during
ID: 165320 • Letter: W
Question
Which of the following best describes the mechanism of pigment separation during paper chromatography?
Polar pigments adhere to the paper and dissolve in the solvent.
Non-polar pigments adhere to the paper and dissolve in the solvent.
Polar pigments adhere to the paper, and non-polar pigments dissolve in the solvent.
Non-polar pigments adhere to the paper, and polar pigments dissolve in the solvent.
A.Polar pigments adhere to the paper and dissolve in the solvent.
B.Non-polar pigments adhere to the paper and dissolve in the solvent.
C.Polar pigments adhere to the paper, and non-polar pigments dissolve in the solvent.
D.Non-polar pigments adhere to the paper, and polar pigments dissolve in the solvent.
Explanation / Answer
Ans c
Polar pigments adhere to the the paper, and non polar dissolve in solvent.
As the paper is made up of cellulose (polar) , it will attract polar molecules and molecules are held back due to this. Whereas non polar molecules get dissolved in organic solvents and travel up in the chromagram.