Dear student
A fire extinguisher or simply an extinguisher is an active fire protection device used to extinguish or control small fires, mainly in emergency situations. It is not intended to use on an out-of-control fire. A fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire.
The most used fire extinguishers are,
(i) Carbon dioxide fire extinguishers: In this type of fire extinguishers, carbon dioxide which is a non-supporter of combustion, is filled in cylinders under high pressures. When released, it cuts off the air supply to the burning substance and extinguishes the fire.
(ii) Soda acid fire extinguishers: In this type of fire extinguishers, concentrated solution of sodium hydrogen carbonate and sulphuric acid are stored separately in two chambers. On using the fire extinguisher, both the substances come in contact with each other producing carbon dioxide