Which acid is present in the soda acid fire extinguisher?

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Hydrochloric acid

Sulphuric acid

Citric acid

Nitric acid

answer is B.

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Detailed Solution

Concept- An acid soda fire extinguisher works by cutting off the air supply. Works on all types of fire except electrical fire and flammable liquids. Carbon dioxide is released by the action of acid on baking soda. Increases the percentage of carbon dioxide in the air (

C O_{2}

does not support combustion).
The soda acid fire extinguisher consists of an acid i.e. sulphuric acid and baking soda

.
When sulphuric acid and baking soda of extinguisher reacts, carbon dioxide gas is released which helps to extinguish the fire because fire spreads due to the availability of oxygen in the air in excess but when carbon dioxide is liberated, its concentration in the air increases and being a non-supporter of combustion, it stops the fire from spreading and extinguishes it.
The reaction of acid soda fire extinguisher is shown as-

Hence, the correct option is (2).

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