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प्रश्न
What are the different types of coal?
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उत्तर
- Coal is a fossil fuel. It contains carbon, hydrogen and oxygen. It also contains nitrogen, phosphorus and sulphur. It occurs in the solid state.
- Coal is classified on the basis of its carbon content into:
- Peat: It has a high water content and less than 60% carbon content.
- Lignite: Lignite is a transformed form of peat and has around 60 to 70% of carbon content.
- Bituminous: It is the most commonly found variety of coal in India is bituminous and has a carbon content of 70-90%.
- Anthracite: It has a carbon content of more than 95% which makes it suitable for iron smelting.
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संबंधित प्रश्न
Fossil fuels are ______, ______ and ______.
Fossil fuels can be made in the laboratory.
Coke is almost pure form of carbon.
Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?
Which substance is formed by the carbonisation of dead vegetation?
Coal tar is a black, thick ______ with an ______ smell.
The underlined word in the following sentence have been jumbled up. Write them in their correct form.
Loca is obtained from mines.
The slow process of conversion of dead vegetation into coal is called ______.
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.
Name the products obtained and their uses when coal is processed in industry.
When lignite becomes darker and harder over time ______ coal is formed.
Which one among the following is an extremely strong but lightweight material is used in mountain bikes and tennis rackets?
______ coal is black and dull coal.
Coal helps to create alumina refineries.
Coke is used in the preparation of dyes, explosives, paints synthetic fibers, and pesticides.
What is deep mining?
What are the uses of coal?
