Advertisements
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Describe how coal is formed from dead vegetation. What is this process called?
Fossil fuels can be made in the laboratory.
Coal tar is a mixture of various substances.
Anthracite is known as the highest-grade coal. Give reason.
Coal is formed from the remains of
Which substance is formed by the carbonisation of dead vegetation?
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.
Name the products obtained and their uses when coal is processed in industry.
When lignite becomes darker and harder over time ______ coal is formed.
______ coal is black and dull coal.
Activated carbon, used in filters for water and air purification and in ______ machines is obtained from coal.
Coke is used in the preparation of dyes, explosives, paints synthetic fibers, and pesticides.
