• Post category:Udemy (Oct. 2021)
  • Reading time:5 mins read


Combustion and Flames Chapter 6 Class 8

What you will learn

Q.1. Define Combustion and ignition temperature. List conditions under which combustion can take place.

Q.2. What is caused by burning of wood and coal? Q.3. What type of fire extinguishers should be used to control the fire produced by oil?

Q.4. Explain how the use of CNG in automobiles has reduced pollution in our cities. Q. 5. Compare LPG and wood as fuels.

Q.6. Give reasons. (a) Water is not used to control fires involving electrical equipment. (b) LPG is a better domestic fuel than wood.

(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.

Q.7. Make a labelled diagram of a candle flame and write a few lines on the same. Q..8. Name the unit in which the calorific value of a fuel is expressed.

Q.9. Explain how CO2 is able to control fires. Q.10. It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.

Q.11. Which zone of a flame does a goldsmith use for melting gold and silver and why?

Q.12. Can the process of rusting be called combustion? Discuss. + 53 Multiple Choice Questions with Answers

Description

Q.1. Define Combustion and ignition temperature. List conditions under which combustion can take place.

Q.2. What is caused by burning of wood and coal?

Q.3. What type of fire extinguishers should be used to control the fire produced by oil?

Q.4. Explain how the use of CNG in automobiles has reduced pollution in our cities.

Q. 5. Compare LPG and wood as fuels.

Q.6. Give reasons.

(a) Water is not used to control fires involving electrical equipment.

(b) LPG is a better domestic fuel than wood.

(c) Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.


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Q.7.Make a labelled diagram of a candle flame and write a few lines on the same.

Q.8. Name the unit in which the calorific value of a fuel is expressed.

Q.9. Explain how CO2 is able to control fires.

Q.10. It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.

Q.11.Which zone of a flame does a goldsmith use for melting gold and silver and why?

Q.12. Can the process of rusting be called combustion? Discuss.

+ 53 Multiple Choice Questions with Answers

English
language

Content

Introduction
Introduction
Conditions necessary for combustion, ignition temperature, LPG vs. wood as fuels
Conditions necessary for combustion, ignition temperature, LPG vs. wood as fuels
How CO2 control fires, water is not used to control electrical fire etc.
How CO2 controls fire + many more questions
18 important MCQs
18 important MCQs with complete explanation.
35 important MCQs with complete explanation
35 important MCQs with complete explanation