What is the means of purification of solids?

The means of purification of solids typically involve techniques such as recrystallization, where a solid is dissolved in a suitable solvent at high temperature and then allowed to crystallize slowly as the solution cools, leading to the formation of pure crystals. Other methods include sublimation, which separates volatile impurities, and extraction, which utilizes solvent properties to isolate specific components. Filtration and chromatography can also be employed to separate and purify solid mixtures. Each method relies on the differing physical or chemical properties of the substances involved.