Question

how does baking soda help in extinguishing fire?​

Answer 1

Dear RKSinha,

The hydrogen present in Baking Soda (NaHCO3) covers the fire and cuts off the supply of oxygen thus helping in extinguishing it.

Answer 2

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Baking soda is used in fire extinguishers along with sulphuric acid. When the need arises, the baking soda and sulphuric acid react to evolve carbon dioxide gas. It is black coloured gas which is a poisonous gas. It escapes from the nozzle of the fire extinguisher with force and forms a cover or blanket around the fire. Since the gas does not support combustion, the fire gets extinguished.