Which of the following coal contains 90 percent of carbon?

Which of the following coal contains 90 percent of carbon? 

(1) Anthracite 

(2) Bitumen 

(3) Lignite 

(4) Peat 


Answer: (1) Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and Nitrogen. Anthracite contains 90 per cent of carbon. 

Which of the following coal contains 90 percent of carbon?   (1) Anthracite   (2) Bitumen   (3) Lignite   (4) Peat


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