Good Morning Brainliens...!!
Chapter: 6 || Sources of energy
Sub: Chemistry
Class: 08.
2. Differentiate between lignite and bituminous coal.
3. How do petroleum and natural gas occur in nature?
5. Keeping in mind their availability in nature explain the need of using coal and petroleum judiciously.
Give correct answers...!!!
Answers
Answer:
ii) Bituminous coal is a middle rank coal between subbituminous and anthracite. Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Lignite has a low heating value and a high moisture content and is mainly used in electricity generation
iii) Petrol and natural gas are formed from the remains of plants and animals buried deep inside the earth crust. They are also known as fossil fuels. Million years ago, the plants and algae live in the shallow sea and after dying they were deep buried under the layers of the earth. These are formed in millions of years.
v) Coal and petroleum are fossil fuel and non renewable sources of energy. Their formation naturally takes place in thousands of years. ... So, in order to prevent their depletion in the future, the coal and petroleum should be used judiciously.
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Answer:
2 --
Lignite: Lignite coal, aka brown coal, is the lowest grade coal with the least concentration of carbon. Lignite has a low heating value and a high moisture content and is mainly used in electricity generation.
Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. Bituminous coal usually has a high heating (Btu) value and is used in electricity generation and steel making in the United States. Bituminous coal is blocky and appears shiny and smooth when you first see it, but look closer and you might see it has thin, alternating, shiny and dull layers.
3-Petrol and natural gas are formed from the remains of plants and animals buried deep inside the earth crust. They are also known as fossil fuels. Million years ago, the plants and algae live in the shallow sea and after dying they were deep buried under the layers of the earth. These are formed in millions of years.
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Explanation:
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