Which pa of chlorine disinfection is most effective?-
Correct Answer: Hypochlorous acid
Description: The disinfecting action of chlorine is mainly due to hypochlorous acid. It is 70-80 times effective than hypochlorite ion. So chlorine acts as best disinfectant a when pH of water is around 7 because of the predominance of hypochlorous acid. (PARK TB 25th edition pg 774)
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