Fire extinguisher.
1. Dry powder fire extinguisher : It contains sand and baking soda. When this mixture is thrown over fire, baking soda decomposes to release carbon dioxide which extinguishes the fire.
2. The soda acid fire extinguisher is based on the principle of extinguishing fire by cooling the burning substance below it's ignition temprature and by cutting of the supply of air.
3. The foam type fire extinguisher is based on the principle of extinguishing fire by cutting off air supply to the burning substance.
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