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Explain the process of formation of petroleum. - Science

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प्रश्न

Explain the process of formation of petroleum.

लघु उत्तर
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उत्तर

Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and became covered with layers of sand and clay. Over millions of years, the absence of air, high temperature, and high pressure transformed the dead organisms into petroleum and natural gas.

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पाठ 5: Coal and Petroleum - Exercises [पृष्ठ ६३]

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एनसीईआरटी Science [English] Class 8
पाठ 5 Coal and Petroleum
Exercises | Q 8 | पृष्ठ ६३

संबंधित प्रश्‍न

How can you as an individual contribute or make a difference to the management of coal and petroleum


Why are coal and petroleum categorised as natural resources? Give a reason as to why they should be used judiciously.


Fill in the following blanks with suitable words :
LPG is a ........... fuel but biogas is not a..........fuel.


Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why?


Why should fossil fuels like coal and petroleum be used judiciously?


Which of the following is not a natural resource?
(a) soil
(b) water
(c) electricity
(d) natural gas


There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.
(a) What are (i) fuel A, and (ii) fuel B?
(b) Name (i) C (ii) D (iii) E, and (iv) F
(c) What is the process of formation of F during lightning known as?
(d) Which fuel is supposed to be exhausted sooner : A or B?
(e) Which fuel is mostly used for generating electricity at thermal power plants?


Match the following.

Octane rating Diesel
Cetane rating Methane
Simplest hydrocarbon Petrol
Peat Bown in colour
Lignite First stage coal

The underlined word in the following sentence have been jumbled up. Write them in their correct form.

Keenrose is a fuel used in jet crafts. 


We say fossil fuels will last only for a few hundred years. Comment.


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