Question

explain destructive distillation in detail

Answer 1

Process in which a solid material (usually coal or wood) is heated at high temperature out of contact with air to make coke, coal tar, or charcoal. It is called 'destructive' because the chemical composition of the end product is distinctly different from that of the input material. See alsofractional distillation.
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Answer 2

destructive distillation is the process of strong heating of coal in the absence of air.