Question

Study of methods of purification of water

Answer 1

The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination and the use of electromagnetic radiation such as ultraviolet light.

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Answer 2

the common methods for purification are crystallisation, sublimation, distillation , chromatography etc.
crystallisation IS the process of forming crystals crystallisation by cooling a hot concentrated solution.
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