A It can be separated into useful substances by fractional distillation.
B It consists mainly of hydrocarbons.
C It is found underground in many parts of the world.
D Its main use is for making lubricants and polishes.
Pregunta 2
Pregunta
The diagram shows an industrial process. Substance M is one of the substances produced by this process and is used as aircraft fuel.
What is this process and what is substance M?