MEDIUM
8th CBSE
IMPORTANT
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What is the colour of a luminous flame?

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Important Questions on Combustion, Flame and Fuels

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q A
Which of these can be used in case of an electric fire?
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q A
An ideal fuel must have _____.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q A
Acid rain contains _____.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q B
_____ are obtained from natural fuels by various physical and chemical processes.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q B
_____ of the fuel is the heat liberated when one gram of fuel burns completely in oxygen.
EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q B
_____ is a region where combustion of fuel takes place. (Flame/ Vacuum)
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q B
If the amount of oxygen present is limited, it results in the _____ combustion of fuel. (incomplete/complete)
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>ASSESSMENT ZONE>Q B
Ideal fuel has _____ calorific value. (low/ high)