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Solutions ⇒ Class 8th ⇒ Science ⇒ 5. Coal And Petroleum

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

CBSE board students who preparing for class 8 ncert solutions maths and Science solved exercise chapter 5. Coal And Petroleum available and this helps in upcoming exams 2023-2024.

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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.

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Solutions ⇒ Class 8th ⇒ Science
1. Crop Production And Management
2. Microorganisms : Friend And Foe
3. Synthetic Fibres And Plastics
4. Materials : Metals And Non-Metals
5. Coal And Petroleum
6. Combustion And Flame
7. Conservation of Plants And Animals
8. Cell - Structure and functions
9. Reproduction in animals
10. Reaching the age of adolescence
11. Force And Pressure
12. Friction
13. Sound
14. Chemical Effects of Electric Current
15. Some Natural Phenomena
16. Light
17. Stars And The Solar System
18. Pollution of Air and Water

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