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Question: Which gas is evolved from a fire extinguisher? A.\({{C}}{{{O}}_2}\) B.\({{CO}}\) C.\({{C}}{{{O...

Which gas is evolved from a fire extinguisher?
A.CO2{{C}}{{{O}}_2}
B.CO{{CO}}
C.CO3{{C}}{{{O}}_3}
D.H2{{{H}}_2}

Explanation

Solution

A fire extinguisher is a device used to put out fire in situations of emergency. The basic principle behind using a fire extinguisher is to deprive the fire of its most basic requirements, that is, oxygen. Different types of extinguishers use different principles, where in, some extinguishers interfere with the chemical reactions occurring during fire.

Complete answer:
One of the most common fire extinguishers is the carbon dioxide fire extinguisher which works by displacing oxygen which promotes fire with carbon dioxide which has the potential to put out fire by cutting the oxygen supply. It also takes away the heat element of the fire triangle in addition to taking away the oxygen element from it. The carbon dioxide gas which comes out of the fire extinguisher is very cold and thus, helps in cooling the fuel. Carbon dioxide fire extinguishers are composed of non-flammable gas, carbon dioxide which is filled in the cylinder under extreme pressure.

Hence, option (A) CO2{{C}}{{{O}}_2} is the correct answer.

Additional Information:
Soda-acid fire extinguisher is a type of fire extinguisher which is suitable to be used on any types of fire except, electrical and inflammable liquid fires.
In these types of fire extinguishers, inside the cylinder will be a bottle containing sulphuric acid and another metallic container containing baking soda solution in it. On inversion of the cylinder and striking on ground, the glass bottle breaks and sulphuric acid comes in contact with the baking soda solution leading to the formation of CO2{{C}}{{{O}}_2} gas. This really helps to put out fire.
2NaHCO3+H2SO4→Na2SO4+2H2O+2CO2{{2NaHC}}{{{O}}_3}{{ + }}{{{H}}_2}{{S}}{{{O}}_4}{{ }} \to {{ N}}{{{a}}_2}{{S}}{{{O}}_4}{{ + 2}}{{{H}}_2}{{O + 2C}}{{{O}}_2}

Note:
Carbon dioxide fire extinguishers are a type of fire extinguishers which are used to extinguish fire by cutting the oxygen supply in the area of fire and also by cooling the fuel. Carbon dioxide gas, being a non-supporter of fire is a very good candidate for this purpose.