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How will you separate the constituents p...

How will you separate the constituents present in the following mixtures ?
(i) Common salt and water (ii) Iodine and sand
(iii) Kerosene and water (iv) Sugar and sulphur.

Text Solution

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(i) Common salt and water. Since common salt (sodium chloride) is soluble in water, it can be separated by crystallisation. The process of distillation can also be used because sodium chloride is non-volatile and water is volatile in nature.
(ii) Iodine and sand. Sublimation process can be used. Iodine will sublime on heating while sand will remain unaffected.
(iii) Kerosene and water. The liquids are not miscible with each other. Separation can be done by using a separating funnel.
(iv) Sugar and sulphur. The mixture is dissolved in carbon disulphide in a beaker by stirring with a glass rod. Sulphur dissolves while sugar remains as such. On filtering, sugar separates as the residue. The filtrate upon concentration and cooling gives crystals of sulphur.
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