MEDIUM
8th CBSE
IMPORTANT
Earn 100

Draw a diagram showing the different zones of a candle flame. Label the zone which contains the unburnt vapours of wax.

Important Questions on Combustion

EASY
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 1
Draw a diagram showing the different zones of a candle flame. Label the zone which contains the unburnt carbon particles.
MEDIUM
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 2
Calorific value of wood is 18,000 kJ/kg. How much of wood is required to produce 360,000 kJ of heat energy?
HARD
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 3
Why are gaseous fuels better than the solid and liquid ones?
MEDIUM
8th CBSE
IMPORTANT
The Living World A book of Science and Technology>Chapter 7 - Combustion>Something To Know>Q 4
Why do we say that 'burning of fuels' can cause 'health hazards'?