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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.
Coal tar is a mixture of various substances.
What are the different types of coal?
Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?
When heated in air, coal burns and produces mainly ______ gas.
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Loca is obtained from mines.
The black thick liquid with ______ smell is known as coal tar.
During the processing of coal to get coke, coal tar and ______ are also obtained.
Write True/False against the following statement.
Under high temperature and pressure, dead plants get slowly converted to coal.
Write the characteristics and some important uses of coal.
Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?
Which one among the following is an extremely strong but lightweight material is used in mountain bikes and tennis rackets?
______ is used to make face packs and cosmetics.
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.
Explain the destructive distillation of Coal.
