जलजनित रोगों की मुख्य वजह उसमें पाए जाने वाले कोलीफार्म बैक्टीरिया होता है। इसको नष्ट करने के लिए पानी में क्लोरीन मिलाया जाता है।
Why do we use alum in water
STP me chlorine kitti dalte hai formula kya hai dosing ka
Pani me ozone kyu milate h
Sewage water main chlorine or mg liter Kitna date h
Clear water ki turbitity कितनी होनी चाहिये
Pani me chlorine dalne ki quantity kya he
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Clorine pani me kyu milaaya jata he