MEDIUM
8th CBSE
IMPORTANT
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The rubbing surface on the side of a matchbox has a coating of powdered glass and a little red phosphorus.

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Important Questions on Combustion and Flame

MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q II
In the absence of air, a combustible substance can burn if it is heated to its ignition temperature.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q II
On heating, a paper cup containing water catches fire.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q II
Petrol can be used as a fuel in stoves.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q II
It is possible to achieve complete combustion of a substance.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q III
Identify the substance that a matchstick cannot light easily.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q III
The modern safety match was developed about _____ ago.
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q III
The colour of a flame depends on
MEDIUM
8th CBSE
IMPORTANT
Study Mate Science Class 8>Chapter 6 - Combustion and Flame>NaTTY NUT>Q III
The temperature of a yellow flame is _____ that of a blue flame.