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Question
Common salt obtained from sea water is impure. It is purified by:
Common salt obtained from sea water is impure. It is purified by:
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Solution
The correct option is B Crystallisation
Common salt is obtained from sea water through evaporation technique. But it contains impurities. To obtain purified salt, crystallisation process is used, where we obtain the crystals of pure salt.
Filtration is used to separate insoluble solids from liquid and chromatography is used to separate various components of a dye/ink, where components have different solubilities in same solvent. Therefore, these techniques cannot be used to separate pure salt from impure samples.
Common salt is obtained from sea water through evaporation technique. But it contains impurities. To obtain purified salt, crystallisation process is used, where we obtain the crystals of pure salt.
Filtration is used to separate insoluble solids from liquid and chromatography is used to separate various components of a dye/ink, where components have different solubilities in same solvent. Therefore, these techniques cannot be used to separate pure salt from impure samples.
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