MEDIUM
8th CBSE
IMPORTANT
Earn 100

What is ignition temperature? How does the difference in ignition temperature of fuels affect their use?

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
Differentiate between spontaneous combustion and explosion.
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
How can a fire be extinguished?
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
Draw a labelled diagram of a soda-acid fire extinguisher. Explain how it works.
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
Draw a labelled diagram of a candle flame and explain what happens in each zone.
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
Compare the usefulness of solid, liquid and gaseous fuels.
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
What are the characteristics of a good fuel? Which fuel comes closest to an ideal fuel?
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q E
Write a short note on the harmful by-products of combustion.
HARD
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Higher-order Thinking Skills>Q 1
Why does a candle flame go out when you blow on it? (Hint: It is wax vapour that burns. Think of the methods used to extinguish fires and what happens to the vapour when you blow on it)