Products of coal | Class 8, Coal and Petroleum
Mar 20, 2019· 2)All the gases present in coal gas can burn to produce heat,due to which coal gas is an excellent fuel. 3)It is used as a fuel in industries. Coal tar. It is a thick,black liquid having an unpleasant smell which is obtained by heating coal in the absence of air. 1)It is a mixture of about 200 carbon compounds or organic compounds.