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Question

Which of the following chemicals is used to disinfect water?


A

Chlorine

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B

Washing soda

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C

Silica

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D

Coal

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Solution

The correct option is A

Chlorine


The three chemicals most commonly used as primary disinfectants are chlorine, chlorine dioxide and ozone. Monochloramine usually referred to as chloramine, is used as a residual disinfectant for distribution.

Sodium Carbonate (aka Washing Soda or Soda Ash) is a highly alkaline substance that's unique chemical composition makes it excellent for household uses like degreasing, brightening and cleaning tough messes.

Silica gel packets are used to absorb moisture and keep things dry.

The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel.


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