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प्रश्न
Look at the figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer?
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उत्तर
Oil is lighter than water, hence floats over it.
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संबंधित प्रश्न
Which fossil fuels were formed by the buried remains of small plants and animals?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
Coal cannot be converted into one of the following forms of energy. This is:
(a) coal gas
(b) electricity
(c) oil
(d) charcoal
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name another element which is usually found in combination with X in fossil fuels.
Fill in the following blank with suitable word:
Biomass is another form in which ........... energy manifests itself.
The constituent of biogas which makes it an excellent fuel is:
(a) butane
(b) methane
(c) propane
(d) ethane
An energy efficient devices for producing light is:
(a) DLF
(b) CFL
(c) FCL
(d) LPG
Fill in the blank
Solar cells use the power supplied by the ______.
Which of the following is a non-renewable source of energy?
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
