Combustion and Flame Class 8 C

Pick the inflammable substance:

• Stone

• Sand

• Kerosene

• Glass

Which is an example of Rapid combustion?

• Burning of Phosphorous

• Burning of Magnesium

• Burning of LPG

• Burning of crackers

Forest fire is an example of:

• Rapid combustion

• Explosion

• Spontaneous combustion

• No combustion

Carbon dioxide helps in:

• Burning of substance

• Cutting off the supply of oxygen

• Bringing down the temperature of the burning substance

• None of the above

The hottest part of the flame is:

• Black in colour

• Yellow in colour

• Blue in colour

• Red in colour