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CBSE Class 9 Answered

Mam,
Asked by supriyaa.yn | 19 Aug, 2008, 10:33: PM
answered-by-expert Expert Answer

there are many methods by which the water gets purified few of them are reverse osmosis and uv light , reverse osmosis removes most of the impurities in the water where as in uv light irradiation micro-organisms like bacterias are killed.

Answered by | 20 Aug, 2008, 07:27: AM
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