EASY
8th CBSE
IMPORTANT
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Coal is an inflammable fuel.

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Important Questions on Combustion

EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 2
The outermost part of a candle flame contains unburnt carbon particles.
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 3
The heat produced, by burning completely one kilogram of a given fuel, is known as the efficiency of that fuel.
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 4
All solid fuels have a higher calorific value than liquid and gaseous fuels.
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 5
Sulphur dioxide gas, produced during combustion of fossil fuels, causes acid rain.
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 1
An example of a non-combustible substance is 
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 2
A fuel starts burning only when it is heated to 
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 3
The highest temperature zone of a candle flame, is its-
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 4
The amount of heat produced, on complete combustion of 10 kg of a given fuel, in pure oxygen, equals H kilojoule. The calorific value, of that fuel, would equal-