Crude oil is a thick, dark liquid found in rocks deep underground.
Crude oil is a mixture of many different hydrocarbons.
State what is meant by a hydrocarbon.
Most of the hydrocarbons in crude oil are alkanes.
The general formula of the alkanes is CnH2n+2\mathrm{C_{n}H_{2n+2}}CnH2n+2.
An alkane molecule has 12 carbon atoms. What is the formula of this alkane?
Crude oil is separated into fractions in a fractionating column.
Complete the sentences about fractional distillation.
Use words from the list: bottom, condense, evaporate, filter, higher, lower, top
The crude oil is heated so that most of it will ...... . The column is hot at the bottom and cooler at the ...... . Each fraction will ...... at a different height in the column. Fractions that contain large molecules have ...... boiling points.
Crude oil is a feedstock for the petrochemical industry.
Name one type of product, other than a fuel, that is made using chemicals from crude oil.
Crude oil is a finite resource.
Explain what this means.
Long-chain hydrocarbons from crude oil can be broken down into shorter, more useful molecules.
Name this process and state one condition used.
63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.