Question

addition of chlorine to water is used to kill any bacteria and other living organisms that may be in the water is called
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Answer 1

OZONATION

Explanation:

Another form of disinfection is ozonation. Both chlorination and ozonation kill organisms by oxidation.To ensure continued protection against harmful organisms, a certain amount of chlorine must remain in the water after treatment. The remaining chlorine is known as a residual chlorine.