This video explains about the natural Resources. This also explains about the Inexhaustible Natural Resources and Exhaustible Natural Resources.Coal is as hard as stone and is black in colour.
This video explains about Destructive distillation of coal, coke, coaltar, coal gas, ammoniacal liquor.It also explains the uses of coal.
This video explains about the Story of Coal.Coal contains mainly carbon, the slow process of conversion of dead vegetation into coal is called carbonisation. Since it was formed from the remains of vegetation, coal is also called a fossil fuel.
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