Explain in brief about coal tar and coal gas.

Coal tar.

It is a dark black coloured liquid, mostly various types of organic compounds are present in it. Earlier it was used for the preparation of explosives, dyes, artificial fibres, drugs, pesticides. Now a days organic substances are obtained from petroleum products instead of coal tar.

Coal gas:

mostly carbon monoxide and some other gaseous hydrocarbon compounds that are present in coal gas. This mixture of gases is combustible and is used as fuel.