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