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प्रश्न
What are the different types of coal?
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
Describe how coal is formed from dead vegetation. What is this process called?
Fossil fuels are ______, ______ and ______.
Coke is almost pure form of carbon.
Explain why fossil fuels are exhaustible natural resources.
Describe characteristics of coke.
Coal tar is a mixture of various substances.
Anthracite is known as the highest-grade coal. Give reason.
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 the characteristics and some important uses of coal.
______ coal is black and dull coal.
______ is used to make face packs and cosmetics.
Activated carbon, used in filters for water and air purification and in ______ machines is obtained from 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?
Explain the destructive distillation of Coal.
