Question

Match the mixtures with their preferred method of separation.

• A. Evaporation
• B. Sublimation
• C. Chromatography

Answer 1

$\bullet$ For separation of salt, the seawater is collected in shallow pits and allowed to evaporate in sunlight. In few days, the water evaporates, leaving behind salt.

$\bullet$ The mixture of camphor and salt can be separted by sublimation. Here, camphor will undergo sublimation on heating (conversion from solid to vapour) while salt will not.

$\bullet$ Dye is a mixture of various colours. The difference in solubility of the components in the solvent helps in seperating different colors from dye. The coloured component which is more soluble in solvent rises faster and the component which is less soluble rises slowly. In this way, colours get separated from a dye by chromotography.