Q.

The gas used to extinguish fire is –

A. Neon
B. Nitrogen
C. Carbon dioxide
D. Carbon monoxide
Answer» C. Carbon dioxide
Explanation: Fires require these 3 things: a fuel (a hydrocarbon, which is a compound containing only carbon and hydrogen), a source of oxygen, and heal. Carbon Dioxide is most commonly used to extinguish fire as it displaces wwgen, thus choking the very source of a fire.
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