MEDIUM
8th CBSE
IMPORTANT
Earn 100

Give reasons why for any fuel to burn, it is essential to reach its ignition temperature?

Important Questions on Combustion, Flame and Fuels

EASY
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 1
Substances which burn or catch fire easily are called as _____ substances. (combustible / non-combustible)
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 1
Any substance or medium which supports combustion is called _____ of combustion.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 1
Digestion of food is an example of _____.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 1
The flame of a Bunsen burner is _____ when the air hole is open. (yellow / blue)
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 1
_____ metal is stored in kerosene to cut off the contact with air.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 2
Who am I?
I am the outermost zone of a flame_____(luminous zone/ non-luminous zone).
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 2
Who am I?
I am that zone of the flame which appears orangish-yellow _____. (non-luminous zone/ luminous zone).
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 6 - Combustion, Flame and Fuels>TRACK YOUR PROGRESS>Q 2
Who am I?
I am the coldest zone of a candle flame _____.