What is fractional distillation and why is it important in the use of petrol?
Fractional distillation is the process of separating the constituents of crude oil into purer forms by the use of their different boiling/condensing points. Its use is important because it is the easiest and simplest method of separating them; since petrol engines can only use certain types of fuel efficiently, being able to put the right mix into the fueltank is extremely useful.