Question

What is meant by destructive distillation of coal​

Answer 1

Answer:

The decomposition of a complex substance, such as wood or coal, by heating it in the absence of air and collecting the volatile products.

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Answer 2

Explanation:

The process of heating coal in the absence of air is called the destructive distillation of coal. Coal contains a number of elements such as carbon, hydrogen, oxygen, nitrogen and sulphur. When coal is heated in the absence of air, a number of products are obtained. Products obtained from the destructive distillation of coal are

Coke: contains 98 % carbon. It is porous, tough, black and the purest form of coal. Like charcoal, it is a good fuel and burns without smoke.

Coal tar (liquid): Coal tar is a mixture of different carbon compounds. Its thick, black liquid with unpleasant smell. The fractional distillation of coal tar gives many chemical substances which are used in the preparation of dyes, explosives, paints, synthetics fibres, drugs, and pesticides.

Coal Gas: Coal gas is mainly a mixture of hydrogen, methane and carbon monoxide. The gases present in coal gas are combustible and hence, it is an excellent fuel.

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