What crude oil is
What crude oil is
Crude oil is a naturally occurring dark liquid found underground, but it is not one pure substance. It is a mixture of many compounds, so its components are not chemically bonded to each other.
Step-by-step lessons covering Edexcel IGCSE Chemistry Crude oil for IGCSE Chemistry. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build a solid grasp of atomic structure, bonding and the mole concept early, since these underpin almost every other topic, then move on to the more calculation-heavy quantitative and organic chemistry content.