Chemistry
Describe the formation of coal.
Carbon
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Answer
The process of formation of coal is described below:
- Coal was formed by the bacterial decomposition of ancient vegetable matter buried under successive layers of the earth.
- Under action of high pressure and temperature, in absence of air, the decayed vegetable matter converted into coal through a series of steps as shown in the figure below.
- With each successive layer of coal formed, the amount of carbon present in the deposit increased and level of impurities decreased.
- This process of formation of coal is known as carbonization which took millions of years.
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