Question

what is destructive distillation

Answer 1

Destructive distillation is the chemical process of the decomposition of unprocessed material by heating it to a high temperature; the term generally applies to processing of organic material in the absence of air or in the presence of limited amounts of oxygen or other reagents, catalysts, or solvents, such as steam or phenols. It is an application of pyrolysis. The process breaks up or 'cracks'large molecules. Coke, coal gas, gas carbon, coal tar, ammonia liquor, and "coal oil" are examples of commercial products historically produced by the destructive distillation of coal.

Answer 2

Strong heating of coal , in absence of air is called destructive distillation

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