Question

What is the percentage of carbon in bituminous coal?
A.$28 - 30\% $
B.$28\% $
C.$78 - 86\% $
D.$94 - 98\% $

Answer 1

Hint: Bituminous coal is a dense black sedimentary rock and has well-defined bands or layers of bright and dull materials. It is called so because it contains a tar-like substance which is known as bitumen.

Complete step by step answer:
Bituminous coal is a type of coal. Bituminous coal consists of $17\% $ moisture, $0.5\% $ nitrogen $12\% $ ash content and $78 - 86\% $ carbon. It also contains volatile matters like sulphur and hydrocarbons. On the basis of volatile content, it is divided into three categories-
-low-volatile bituminous
-medium volatile bituminous
-high volatile bituminous
Bituminous coal is also called black coal and soft coal. Its properties are-
-It has high heat value.
-It has low moisture content.
-It is easily stored and transported.
-Lignite is the lowest ranking coal which contains $28 - 30\% $ carbon. It is also called brown coal.
-Peat is partially carbonized debris and organic sediment which contains $28\% $ carbon. It can be transformed into coal.
-Anthracite which is a highest ranking coal contains $94 - 98\% $carbon. It is also known as hard coal.

Hence the correct answer is C.

Note:
Bituminous coal is used in electric power generation. It is also used in the production of steel and cement. It is of two types-
Thermal Coal- It is also called steaming coal. It is used in power plants to produce steam for electricity generation. It has many industrial uses.
Metallurgical coal- It is used in creating coke which is used in production of iron and steel. It is also known as coking coal. Coke is created by heating metallurgical coal at higher temperatures in absence of air.