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Madhya Pradesh Police Exam Model Paper 7
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© examsnet.com
Question : 97
Total: 100
Highest percentage of carbon is present in _____.
Anthracite
Bituminous
Lignite
Peat
Validate
Solution:
The correct answer is
Anthracite
.
Anthracite:
Anthracite is the highest rank of coal. Unlike other types of coal, it is usually considered to be a metamorphic rock.
It has the highest carbon content of
over 87%
on a dry ash-free basis.
Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis.
It is often subdivided into semi-anthracite, anthracite, and meta-anthracite on the basis of carbon content.
Anthracite is often referred to as
"hard coal"
; however, this is a layman's term and has little to do with the hardness of the rock.
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