Question

____ is formed by heating bituminous coal in an oven until all of the volatile matter is driven off.

answer input:
spelling counts but capitalization doesnt.

Explanation:

When bituminous coal is heated in an oven (a process called carbonization or pyrolysis) to drive off volatile matter, the resulting product is coke. Coke is a solid carbonaceous material with high carbon content and low volatile matter, commonly used in metallurgy (like in steel production) and as a fuel.

Answer:

coke