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Solutions 5. Coal And Petroleum - Chapter Review | Class 8 Science - Toppers Study

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Solutions 5. Coal And Petroleum - Chapter Review | Class 8 Science - Toppers Study

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Chapter 5 Science class 8

Chapter Review class 8 Science Chapter 5. Coal And Petroleum

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Solutions 5. Coal And Petroleum - Chapter Review | Class 8 Science - Toppers Study
Class 8 Ncert Solutions
Solution Chapter 5. Coal And Petroleum Class 8
Solutions Class 8
Chapter 5. Coal And Petroleum Chapter Review Class 8

5. Coal And Petroleum

| Chapter Review |

Solutions 5. Coal And Petroleum - Chapter Review | Class 8 Science - Toppers Study

Chapter Review:

Petroleum is a dark oily liquid. It has an unpleasant odour. It is a mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax, etc.
These resources are present in unlimited quantity in nature is called Inexhaustible. Examples are: sunlight, air.
The amount of these resources in nature is limited are called exhaustible. Examples of these resources are forests, wildlife, minerals, coal, petroleum, natural gas etc.
The dead remains of living organisms (fossils). So, these are all known as fossil fuels.
As coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation.
Coke is a tough, porous and black substance. It is almost pure form of
carbon.It is used in the manufacture of steel.
Coal tar is a black, thick liquid with unpleasant smell. It is a mixture of about 200 substances.
Petrol and diesel are obtained from a natural resource called petroleum.
The world’s first oil well was drilled in Pennsylvania, USA, in 1859.
Great commercial importance, petroleum is also called ‘black gold’.
The process of separating the various constituents fractions of petroleum is known as refining. It is carried out in a petroleum
refinery.
Natural gas is a very important fossil fuel because it is easy to transport through pipes.
CNG is used as a fuel for transport vehicles because it is less polluting.

Other Pages of this Chapter: 5. Coal And Petroleum

1. Chapter 5. Coal And Petroleum | Chapter Review

2. Chapter 5. Coal And Petroleum | Text Book Exercise

3. Chapter 5. Coal And Petroleum | Text Book Exercise

4. Chapter 5. Coal And Petroleum | Additional Questions With Solutions

5. Chapter 5. Coal And Petroleum | Additional Questions With Solutions

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