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प्रश्न
Coal and petroleum are formed from the dead remains of organisms and are known as ______.
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उत्तर
Coal and petroleum are formed from the dead remains of organisms and are known as fossil fuels.
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संबंधित प्रश्न
Name the petroleum product used for surfacing of roads.
Explain the process of formation of petroleum.
Why should fossil fuels like coal and petroleum be used judiciously?
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
(a) Name the device X.
(b) What is the source of energy which cooks food in this device?
(c) What is the name of the process which traps energy in this device?
(d) State one advantage (other than saving on fuel) or using such a device for cooking food.
Match the following.
| Octane rating | Diesel |
| Cetane rating | Methane |
| Simplest hydrocarbon | Petrol |
| Peat | Bown in colour |
| Lignite | First stage coal |
What is known as destructive distillation? Write about the products obtained from fractional distillation of petroleum.
Petroleum was formed from organisms
Petroleum, ______ and ______ are fossil fuels.
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Umpetlore is a fossil fuel.
We say fossil fuels will last only for a few hundred years. Comment.
