Which of the following is NOT a non-chlorine water disinfection method?

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Multiple Choice

Which of the following is NOT a non-chlorine water disinfection method?

Explanation:
The ability to distinguish disinfection methods that don’t involve chlorine is the key. Heat or boiling kills microbes by high temperature, with no chlorine involved. Ultraviolet radiation uses UV-C light to damage microbial DNA, also without chlorine. Ozone disinfection relies on ozone gas to inactivate pathogens, again not using chlorine. Chlorination, on the other hand, uses chlorine-based chemicals (like chlorine gas or hypochlorite) to disinfect water. Since it introduces chlorine, it is not a non-chlorine method.

The ability to distinguish disinfection methods that don’t involve chlorine is the key. Heat or boiling kills microbes by high temperature, with no chlorine involved. Ultraviolet radiation uses UV-C light to damage microbial DNA, also without chlorine. Ozone disinfection relies on ozone gas to inactivate pathogens, again not using chlorine. Chlorination, on the other hand, uses chlorine-based chemicals (like chlorine gas or hypochlorite) to disinfect water. Since it introduces chlorine, it is not a non-chlorine method.

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