Question

Which gas is used as a fire extinguisher what if it is replaced with oxygen

Answer 1

Sodium bicarbonate, regular or ordinary used on class B and C fires, was the first of the dry chemical agents developed. In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire. That is, the gas drives oxygen away from the fire, thus stopping the chemical reaction.

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Answer 2

$\huge \text{Hey mate!!}$

✔✔Carbon dioxide is used as fire extinguisher. If it will replace with oxygen then instead of stopping of fire it will increase the fire. ✔✔

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