Carbon Dioxide is heavier than oxygen

When it is sprayed,it covers object like a blanket and cuts oxygen supply

 

Carbon dioxide does not harm electrical equipment

If water is sprayed on electrical equipment,it damages it and can cause short circuit

However,there is no such effect if carbon dioxide is sprayed

 

Carbon dioxide can be stored easily

It is stored in liquid form in cylinders(fire extinguishers)

When it is sprayed ,it expands in volume cutting oxygen supply

 

It reduces ignition temperature

When carbondioxide is sprayed,It also cools down reducing temperature of substance below igntion temperature



 

Questions

NCERT Question 8 - Explain how CO 2 is able to control fires
View Answer

 

NCERT Question 5 (a) - Give reasons:

Water is not used to control fires involving electrical equipment.

View Answer

  1. Class 8
  2. Chapter 6 Class 8 - Combustion And Flame

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.