Chemistry
Define :
(a) A mixture
(b) Crystallisation
(c) Distillation
Elements, Compounds & Mixtures
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Answer
(a) Mixture — Mixtures can be defined as a kind of matter which is formed by mixing two or more pure substances (elements and compounds) in any proportion, such that they do not undergo any chemical change and retain their individual properties.
(b) Crystallisation — Crystallisation is the process of forming solid crystals from a hot super-saturated solution by cooling. It occurs when a substance dissolves in a solvent, and as the solvent evaporates or cools, the solute forms solid crystals. This process is often used to purify substances by separating them from impurities. An example is the crystallization of salt from seawater.
(c) Distillation — Distillation is the process of converting a liquid into vapour by heating and the subsequent condensation of the vapour back into liquid.
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