Question

What happens when coal is heated –? A.In presence of air. B. In absence of air​

Answer 1

Answer:

When heated coal is heated in presence of air produces mainly carbon dioxide gas. + O2 ----------------- CO2 When coal is heated in the absence of air is called destructive distillation of coal. We get many useful products like coke, coal tar and coal gas.

Explanation:

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Answer 2

Answer:

A.In presence of air.

If coal is heated in the presence of air, then coal burns to produce mainly carbon dioxide gas, and no other useful products are obtained.

B. In absence of air

It is a gaseous fuel that is obtained by the strong heating of coal in the absence of air during the processing of coal to get a coke.

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