Multiple choice

Which of the following is used to sterilize drinking water supplied and the water in swimming pools?

  1. Chlorine

  2. Hydrogen

  3. Sodium hydroxide

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlorine is widely used as a disinfectant in water treatment plants and swimming pools to kill bacteria and other pathogens. It is effective at low concentrations and leaves a residual that continues to protect the water.

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