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Question
State in brief the transformation of vegetable matter to different types of coal varying in carbon content.
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Solution
Transformation of vegetable matter to coal is due to slow bacterial decomposition of vegetable matter under the influence of heat from within the earth, high pressure of earth (soil) above it and in absence of oxygen over millions of year.
The different stages of transformation of vegetable matter results in different types of coal
- 60%C is peat
- 65%C is lignite
- 85%C is bituminous
- 90%C is anthracite
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