Question

why it is necessary to refine the petrolum

Answer 1

Crude oil needs to be refined in order to transform it into a range of useful products for industry and consumers.

Answer 2

The answer is no, because each crudeoil is very different and made up of a large number of hydrocarbon. ... Crudeoil is a highly variable mixture of heavy and light hydrocarbons that need to be separated in a refinery to turn them into usable products