What is coal tar explain ?????
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it's an object which is obtained from coal by the process of distructive distillation...
a very important use of it is that it is used to make roads....
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Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal.
It has both medical and industrial uses. It may be applied to the affected area to treat psoriasis and seborrheic dermatitis (dandruff).
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