Question

Name the process which is used to separate the colours in a dye.

• A. Evaporation
• B. Chromatography
• C. Magnetic separation
• D. Distillation

Answer 1

The correct option is B

Chromatography

Chromatography:- a technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates. The various constituents of the mixture travel at different speeds, causing them to separate.

The ink that we use has water as the solvent and the dye is soluble in it. As the water rises on the filter paper it takes along with it the dye particles. Usually, a dye is a mixture of two or more colours. The coloured component that is more soluble in water, rises faster and in this way, the colours get separated. This process of separation of components of a mixture is known as chromatography.