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Chapter 5 - Coal and Petroleum - Brief of Complete Chapter, Class 8 Science Video Lecture

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FAQs on Chapter 5 - Coal and Petroleum - Brief of Complete Chapter, Class 8 Science Video Lecture

1. What are the main sources of coal and petroleum?
Ans. The main sources of coal are fossilized remains of plants that lived millions of years ago. Petroleum, on the other hand, is formed from the remains of tiny marine organisms that lived in the oceans millions of years ago.
2. How is coal formed?
Ans. Coal is formed from the remains of plants that lived and died millions of years ago. Over time, these plants got buried under layers of soil and water. The heat and pressure from the layers above gradually turned the plant remains into coal.
3. What are the different types of coal and how are they different from each other?
Ans. The different types of coal are peat, lignite, bituminous coal, and anthracite. These types of coal are formed at different stages of the coal formation process. Peat is the lowest quality coal, while anthracite is the highest quality and has the highest carbon content.
4. How is petroleum formed?
Ans. Petroleum is formed from the remains of tiny marine organisms, such as plankton, that lived in the oceans millions of years ago. When these organisms died, they sank to the bottom of the ocean and got buried under layers of sediment. Over time, the heat and pressure from the layers above turned their remains into petroleum.
5. What are the uses of coal and petroleum?
Ans. Coal is primarily used as a fuel for power generation and in industrial processes. It is also used in the production of steel and cement. Petroleum, on the other hand, is used as a fuel for transportation, in the production of plastics, and in various other industries for the manufacturing of products like lubricants, fertilizers, and chemicals.
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