Oral Questions
1. Name two exhaustible natural resources.
2. Name any three fossil fuels.
3 Where are most minerals found ?
4. Which one of the following types of coal has the lowest percentage of carbo
Bituminous, Anthracite, Lignite
5. A variety of coal contains 38% carbon, 19% volatile substances and 43% moistur
the variety
DESTRUCTIF DISTILLATION OF COAL
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1 . Examples of exhaustible natural resources are fossil fuels such as oil and coal .
2 . Coal, oil, and natural gas are examples of fossil fuels.
3 . Almost 99% of the minerals making up the Earth's crust are made up of just eight elements. Most of these elements are found combined with other elements as compounds. Minerals are elements or compounds that occur naturally in the Earth's crust.
4 . Lignite has lowest content if carbon nearly less than 60 percent.
5. Destructive distillation of coal. The process of heating coal in the absence of air is called the destructive distillation of coal. Coal contains a number of elements such as carbon, hydrogen, oxygen, nitrogen and Sulphur. When coal is heated in the absence of air, a number of products are obtained.
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