Which one of the following is not used for disinfection of drinking water?
Correct answer: D. Phenyl
- A. Chlorine
- B. Ozone
- C. Chlorine dioxide
- D. Phenyl
Explanation
Chlorine is one of the most widely used disinfectants for water treatment. It is effective at killing a wide range of microorganisms and has a residual effect, providing continued protection as water flows through the distribution system. However, excessive chlorination can lead to the formation of disinfection byproducts (DBPs), some of which are of concern for health.
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