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प्रश्न
What are fossil fuels?
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उत्तर
Fuels formed in the geological past from the remains of living organisms and plants etc. Examples of fossil fuels are coal, petroleum, and natural gas, etc.
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संबंधित प्रश्न
Name two energy sources that you would consider to be renewable. Give reasons for your choices.
Compare and contrast fossil fuels and the Sun as direct sources of energy
Name two sources of energy that you think are renewable. Give reason for your choice.
Name two sources of energy which you consider to be non-renewable. Give reason for your choice.
What are the various fuels which are used to generate electricity in a thermal power plant?
Why is LPG considered a good fuel?
Which fossil fuel formed by the buried remains of large land plants?
The ultimate source of energy stored in fossil fuels is:
(a) moon
(b) earth
(c) sun
(d) sea
A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinder easy.
Name the substance X.
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
Name the major component of biogas.
Describe the construction and working of a biogas plant with the help of a labelled diagram.
Which produced of the nuclear fission of uranium-235 is utilised to cause further fission of its nuclei?
The fossil fuel whose known reserves in the earth are expected to last for the minimum period is:
(a) coal
(b) uranium
(c) petroleum
(d) natural gas
An energy efficient devices for producing light is:
(a) DLF
(b) CFL
(c) FCL
(d) LPG
What are non-renewable resources of energy? Give two examples of such resources.
Give an account of the use of solar energy.
Write a short note on nuclear power.
Name two forms of sea energy.
Fill in the blanks and complete the story.
About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______, these forests got buried under the ______. As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______, dead plants got slowly converted into coal.
