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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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