Coal and Petroleum


You may have seen coal, or heard about it . It is as hard as stone and is black in colour.Coal Coal is one of the fuels used to cook food. Earlier, it was used in railway engines to produce team to run the engine. It is also used in thermal power plants to produce electricity. Coal is also used as a fuel in various industries.

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Coal and Petroleum - Notes
1. Refining of Petroleum
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2. Petroleum
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3. Natural Gas
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4. Some Natural Resources are Limited
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6. Story of coal
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