Question

Name the process by which various dyes present in black ink can be separated. State the principle on which the technique is based

Answer 1

• Paper chromatography can be used to separate dyes present in black ink
• It uses the principle of differential distribution of components present in the mixture (to be separated) between the stationary phase and mobile phase
• In paper chromatography paper act as the stationary phase through which the solvent (mobile phase) moves
• The black ink can be dropped on paper and when water (solvent) moves through the paper, the components separated i.e blue, red, and yellow in different heights

Thus, paper chromatography can be used to separate various dyes present in black ink