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प्रश्न
Anthracite is known as the highest-grade coal. Give reason.
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उत्तर
- Anthracite is the highest grade coal.
- It has a very light weight and the highest heat content.
- Anthracite coal is very hard, deep blacks, and shiny.
- It contains 86-97% carbon and has a heating value slightly higher than bituminous coal.
- It bums longer with more heat and less dust.
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संबंधित प्रश्न
Coke is almost pure form of carbon.
Which substance is formed by the carbonisation of dead vegetation?
Coal tar is a black, thick ______ with an ______ smell.
The slow process of conversion of dead vegetation into coal is called ______.
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?
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.
What are the uses of coal?
