MEDIUM
8th CBSE
IMPORTANT
Earn 100

What is meant by rapid combustion? Give two examples.


Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 10

Explain how the use of CNG in automobiles has reduced pollution in cities?


MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 11

Give two examples each of (i) solid fuels and (ii) liquid fuels.

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 12

State the disadvantages of burning wood as a fuel.

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 13

Water can boil in a paper cup. How?

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 14

Why charcoal does not produce a flame?

EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 15

Define calorific value.


MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 16

How luminous flames differ from non-luminous flames?

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Test>Q 17

Explain how burning of fuels such as coal, petrol and diesel leads to acid rain. Give the harmful effects of acid rain.