Substances that liberate heat on burning are
air
fuels
carbon
soil
The source of all our energy is the
Moon
Sun
Wind
Waves
Which one is an example of non- conventional source of energy?
Petrol
Kerosene
Sunlight
Diesel
Which gas helps for burning?
Oxygen
Hydrogen
Nitrogen
Carbondioxide
An example for conventional source of energy.
Find the odd one.
L.P.G
C.N.G
Kerosene is a product of
Coal
Petroleum
Biogas
None of these
Coal, petroleum and natural gas are known by the name
fossil fuels
bio fuels
alternative fuels
none of these
Petrol is a ____fuel.
Solid
Liquid
Gaseous
