MEDIUM
8th CBSE
IMPORTANT
Earn 100

A (dry chemical/ foam) fire extinguisher uses a chemical such as sodium bicarbonate in powder form to put out fires.

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Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q B
Unburnt _____ (carbon/ calcium) particles in the luminous zone of a candle flame glow with a yellow colour.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q B
A substance that is burnt to obtain heat energy is called a _____.
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q B
_____ (Solid/ Liquid/ Gaseous) fuels have to be stored in sealed containers under high pressure.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q B
A fuel that has a very _____ (low/ high) ignition temperature is dangerous to store.
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q B
Soot is an example of suspended _____. (particulate matter / gaseous fuel)
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q C
The ignition temperature of coal is high; hence it is easy to ignite.
EASY
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q C
During an explosion, a large amount of gas is evolved.
MEDIUM
8th CBSE
IMPORTANT
New Science Ahead 8>Chapter 6 - Combustion and Flame>Exercises>Q C
Water should be used to extinguish a fire caused by electricity.