Question

what happen when coal is heated in the absence of oxygen? ​

Answer 1

Answer:

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Explanation:

Coal gas, gaseous mixture—mainly hydrogen, methane, and carbon monoxide—formed by the destructive distillation (i.e., heating in the absence of air) of bituminous coal and used as a fuel. Sometimes steam is added to react with the hot coke, thus increasing the yield of gas.

Answer 2

Answer:

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The strong heating of coal in the absence of air is called destructive distillation of coal. If coal is heated in the presence of air, then coal burns to produce mainly carbon dioxide gas and no other useful products were obtain