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 10 months ago  

Sorry sorry, I didn't get your point. How chlorine can be formed in water unless we mix it manually in water?

 10 months ago  

Do you know that under UV light chlorine is formed?

 10 months ago  

Yes, I know about it but for that chlorine-based compounds should exist in the water. In water, there exists a low amount of chlorine-based compounds and it can't fully purify water.

 10 months ago  

A lot of methods don’t completely purify water but they help