What do you mean by distructive distilation of coal?

Answer:
Heating coal in a retort until its chemical structure breaks down (destructive or nonreversible). The products are: coal gas, coal tar, and coke.

Ordinary distillation is reversible by just remixing the products. Destructive distillation is nonreversible.
First answer by Eccles-Jordan Trigger. Last edit by Eccles-Jordan Trigger. Contributor trust: 127 [recommend contributor recommended]. Question popularity: 1 [recommend question].