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Question

Which of these following elements is used to kill germs in water to make it safer?

A
Oxygen
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B
Chlorine
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C
Nitrogen
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D
Hydrogen
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Solution

The correct option is B Chlorine
Chlorine is usually added in small quantities to water to make is safer for consumption. It kills germs and other organisms in water since it's harmful to living organisms. This is why chlorine is a good disinfectant.

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