EASY
8th CBSE
IMPORTANT
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All solid fuels have a higher calorific value than liquid and gaseous fuels.

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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 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-
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 5
The gas produced, due to incomplete combustion of carbon fuels, is-
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 1
Define the term 'combustible material'? Give two examples of combustible materials.
EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 2
State the three conditions that are needed for combustion to take place.