Question

When the clothes of a person catch fire, his body is covered with blanket to______
(a)- Stop the supply of oxygen
(b)- Make him feel comfortable
(c)- Save him from any injury
(d)- Hold his body properly

Answer 1

Hint: Whenever a substance is heated, there are some conditions that must be satisfied for the combustion to occur. So, if we put a barrier in fulfilling the condition, then we can stop the combustion process.

Complete answer:
When the clothes of a person catch fire it means that the combustion process takes place. Whenever a substance is heated, there are some conditions that must be satisfied for the combustion to occur. For the combustion to occur, the most important thing is the supply of oxygen, without oxygen the combustion is not possible. So, combustion is a chemical process in which oxygen and fuel combine to give heat and energy.
So, when the body of the person is covered with a blanket, then it is done to stop the supply of oxygen because without oxygen the combustion will stop and stop the person from further burning.
This is the main principle in the fire extinguisher that we use to control over larger burning. Mostly we use carbon dioxide extinguishers, as carbon dioxide is an excellent component that can stop the supply of oxygen from burning.

So, the correct answer is “Option A”.

Note:
There are many other types of fire extinguishers to stop the supply of oxygen like Water extinguishers, foam extinguishers, powder extinguishers, wet chemical extinguishers, fire blankets, etc.