Coke, coal tar and ammoniacal liquor are obtained by destructive distillation of coal.
∙ Ammoniacal liquor, also known as ammonium hydroxide is used in fertilisers.
∙ Coal tar is a mixture of over 200 substances. It is used in the production of naphthalene balls.
∙ Coke is the residual part obtained by the heating of coal. It is used as a reducing agent in metallurgy.