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प्रश्न
Explain the following.
Petrol, diesel, and coal are fossil fuels.
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उत्तर
- Fossil fuels are formed from plants, animals and other organisms that have been buried under the ground millions of years ago.
- Residues buried in the Earth's interior are weathered by temperature and crustal pressure to form coal, mineral oil (petrol, diesel) and natural gas.
- As these substances release energy after combustion, they are used as fuel.
- Therefore, petrol, diesel, coal are fossil fuels.
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संबंधित प्रश्न
Fossil fuels are ______, ______ and ______.
Coke is almost pure form of carbon.
Explain why fossil fuels are exhaustible natural resources.
Describe characteristics of coke.
What are the different types of coal?
Anthracite is known as the highest-grade coal. Give reason.
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Naphthalene balls are obtained from coal tar and are used as
When heated in air, coal burns and produces mainly ______ gas.
Coal tar is a black, thick ______ with an ______ smell.
Name the products obtained and their uses when coal is processed in industry.
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______ coal is black and dull coal.
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Coke is used in the preparation of dyes, explosives, paints synthetic fibers, and pesticides.
Coal is also known as black diamond owing to its precious nature.
What is deep mining?
What are the uses of coal?
