Before revision: Carbochemistry is the branch of chemistry that studies the transformation of coal-(bituminous coal, coaltar , anthracite, lignite, graphite, and charcoal) into useful products and raw materials.
After revision: Carbochemistry is the branch of chemistry that studies the transformation of coal-(bituminous coal, coal tar , anthracite, lignite, graphite, and charcoal) into useful products and raw materials.