AQA C8 Crude Oil

What is crude oil primarily composed of?

• A) A single compound

• B) A mixture of a few compounds

• C) A mixture of a very large number of compounds

• D) Pure hydrogen

What is the general formula for alkanes?

• A) CnH2n

• B) CnH2n+2

• C) CnH2n-2

• D) CnH2n+1

Which of the following is NOT one of the first four alkanes?

• A) Methane

• B) Ethane

• C) Propane

• D) Pentane

What process is used to separate the substances in crude oil?

• A) Filtration

• B) Distillation

• C) Chromatography

• D) Evaporation

What is the main characteristic of hydrocarbons in crude oil?

• A) They contain only hydrogen and oxygen

• B) They contain only hydrogen and carbon

• C) They contain only carbon and nitrogen

• D) They contain only hydrogen and sulfur

What happens to the oil in the fractionating column during fractional distillation?

• A) It is filtered

• B) It is evaporated and condensed at different temperatures

• C) It is frozen

• D) It is mixed with water

Which of the following is NOT a fuel produced from crude oil?

• Petrol

• Diesel oil

• Kerosene

• Ethanol

What property of hydrocarbons decreases as the size of their molecules decreases?

• Viscosity

• Flammability

• Boiling point

• Density

What is produced when hydrocarbons are burnt?

• Carbon dioxide and water

• Oxygen and water

• Hydrogen and carbon dioxide

• Methane and water

Which process involves passing hydrocarbons over a hot catalyst to produce smaller molecules?

• Steam cracking

• Catalytic cracking

• Thermal decomposition

• Polymerization