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Question

_____ can be added to water to kill certain bacteria.

A
Sulphur
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B
Chlorine
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C
Phosphorus
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D
Sodium
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Solution

The correct option is B Chlorine
Water chlorination is the process of adding chlorine or hypochlorite to water. This method is used to kill certain bacteria and other microbes in tap water as chlorine is highly toxic. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, typhoid etc.

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