Chemistry
Grade-8
Easy
Question
Which of the substances are not used as a fuel?
- Coal
- Coke
- Lignite
- Hydrocarbons
Hint:
The coal type which has high moisture content is not used as fuel.
The correct answer is: Lignite
The correct option is c)Lignite.
Due to its high volatile content, lignite is more easily converted into gas and liquid petroleum products than high-grade coal. Unfortunately, it has a high moisture content and is prone to spontaneous combustion, which can cause problems during transportation and storage.
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