Which of the following is used as fire extinguisher ?

Sodium carbonate

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Sodium bicarbonate

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Sodium chloride

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Ammonium chloride

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Solution

The correct option is B Sodium bicarbonate
Sodium bicarbonate, also called sodium hydrogen carbonate, or bicarbonate of soda, $N a H C O_{3}$ , is a source of carbon dioxide and so is used as an ingredient in baking powders, in effervescent salts and beverages, and as the main constituent of dry-chemical fire extinguishers.

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