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CBSE Class 6 Answered

(a) Define evaporation. (b) What is the basis of use of evaporation for separating a mixture? (c) How can you separate common salt dissolved in water by the process of evaporation?
Asked by Topperlearning User | 31 Oct, 2017, 11:14: AM
answered-by-expert Expert Answer

(a) The process of changing of a liquid into its vapours is called evaporation.

(b) The use of evaporation for separating a mixture is based on the fact that liquids vaporize easily whereas solids do not vaporize easily.

(c) Common salt dissolved in water can be separated by the process of evaporation as follows:

The solution of common salt and water is taken in a porcelain dish and heated gently over a burner. The water present in salt solution will form water vapours and escape into atmosphere. When all the water present in the solution gets evaporated, then common salt is left behind in the porcelain dish as a white solid.

Answered by | 31 Oct, 2017, 01:14: PM
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