EASY
8th CBSE
IMPORTANT
Earn 100

What problem will arise if a fuel has an ignition temperature lower than the average room temperature? Name the type of combustion that will occur in such a case.

Important Questions on Combustion and Flame

EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q C
What is an explosion?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q C
Why is water not suitable for extinguishing a fire in an electrical appliance?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
Name and give chemical equations to show the products of the combustion reaction in
(a) limited supply of air.
(b) sufficient supply of air.
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
List the different methods by which a fire can be extinguished.
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
What kind of fires can effectively be put out by water? What kind of fires is it not suitable for? Give reasons for both cases.
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
How does carbon dioxide extinguish a fire?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
What is calorific value of a fuel? Why is hydrogen not used as a fuel though it has the highest calorific value?
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 6 - Combustion and Flame>EXERCISES>Q D
How are fuels classified on the basis of their physical state? Give two examples of each.