How would you demonstrate the process of destructive distillation of coal in the laboratory? 

Destructive Distillation of Coal After arranging the apparatus in the laboratory, coal powder is taken in hard glass test tube, and fix a cork with one hole and glass tube bent at 90° . Test tube is clamped with the stand. In second test tube, we take some amount of water and fix a rubber cork with two holes and each has glass tubes as per figure. Now set the apparatus as per figure and heat the hard glass tube with burner – ultimately we get the solid residue in hard glass tube and coke.