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Q.

Which of the following gas is present in a fire extinguisher?

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a

CO

b

N2

c

O2

d

CO2

answer is D.

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Detailed Solution

  • A fire extinguisher is a device to control a small fire. 
  • As it is known that oxygen is a supporter of combustion, thus to control the fire, one must control the supply of oxygen.
  • This is done by blocking oxygen with a non-supporter gas and that gas is carbon dioxide. Hence, fire extinguishers consist of carbon dioxide (CO2).
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