how can we extinguish flame using calcium carbonate
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Explanation:
Calcium carbonate releases vapours of carbon dioxide near fire and carbon dioxide covers the flame like a blanket hence cutting the supply of oxygen to the flame. Oxygen is very essential for burning. So when there is no oxygen, the flame will extinguish.
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CaCO₃ on thermal decomposition produces CaO and CO₂
CaCO₃ ----Δ-----> CaO + CO₂
The CO₂ produced can be used to extinguish the flame
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