Chemistry
Grade-8
Easy
Question
Identify the correct statement from the following:
- When bituminous coal is heated it produces different types of volatile and non-volatile materials.
- The carbon content in the lignite is only 50- 60 %
- Coal and coke are the purest forms of carbon.
- Coal and coke are the purest forms of carbon.
Hint:
It has 76-86% carbon content.
The correct answer is: When bituminous coal is heated it produces different types of volatile and non-volatile materials.
The correct option is a)When bituminous coal is heated it produces different types of volatile and non-volatile materials.
Bituminous coal can contain harmful impurities such as arsenic and mercury, which are released into the atmosphere as pollutants when the coal is burned. Nitrogen oxides (NOx), carbon monoxide and carbon dioxide are also released when hard coal burns.
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