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Which gas prevents the spread of fire and extinguishes it?
is a type of compressed gas that prevents the spread of fire and extinguishes it.

carbon dioxide

Explanation:

It is a non-flammable gas that extinguishes fire by displacing oxygen. The carbon dioxide is also very cold as it comes out of the extinguisher, so it cools the fuel as well.

Co2(carbon dioxide) cut off the supply of air and to the burning material.The fire is thus put out.

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