Question
Describe soda-acid fire extinguisher.
✓
Answer
Soda-acid fire extinguisher consists of a container filled with sodium bicarbonate solution. Sulphuric acid is also kept inside the container in a sealed glass bottle. To use the extinguisher, the glass bottle containing the acid is broken by striking the plunger. Sodium bicarbonate and sulphuric acid react to form carbon-dioxide, which rushes out through the nozzle. Carbon dioxide is directed towards the fire and it cuts off the supply of air by forming a layer on the fire, and finally the fire gets extinguished.
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