EASY
8th CBSE
IMPORTANT
Earn 100

Define the term 'combustible material'? Give two examples of combustible materials.

Important Questions on Combustion

EASY
8th CBSE
IMPORTANT
State the three conditions that are needed for combustion to take place.
EASY
8th CBSE
IMPORTANT
State the condition under which 'slow combustion' of a material take place.
MEDIUM
8th CBSE
IMPORTANT
Define the calorific value of a fuel.
EASY
8th CBSE
IMPORTANT
State any two characteristics of an ideal fuel.
MEDIUM
8th CBSE
IMPORTANT
Why is water not used in controlling electrical fires?
MEDIUM
8th CBSE
IMPORTANT

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

EASY
8th CBSE
IMPORTANT
Draw a diagram showing the different zones of a candle flame. Label the zone which contains the unburnt carbon particles.
MEDIUM
8th CBSE
IMPORTANT
Calorific value of wood is 18,000 kJ/kg. How much of wood is required to produce 360,000 kJ of heat energy?