EASY
8th CBSE
IMPORTANT
Earn 100

What is unleaded petrol? What is its advantage.

Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q D
What are secondary fuels? Give examples.
EASY
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q D
Why the lowermost zone of flame is called dark zone?
HARD
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
How are fuels classified on the basis of their physical state? Give at least two examples of each.
HARD
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
What is a fire extinguisher? Explain its working.
MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
Mention the different methods by which a fire can be extinguished?
MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
Describe the different zones of a candle flame?
MEDIUM
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
Differentiate between complete and incomplete combustion. Give their word equations.
HARD
8th CBSE
IMPORTANT
I Explore 3rd EDITION A Science Textbook 8>Chapter 5 - Combustion and Flame>EXERCISES>Q E
What do you mean by fuel efficiency? What role does it play in the selection of the fuel?