Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Crude Oil
106 practice questions
Topics covered
Practice questions
11–20 of 106
Question 11
3 marks · Normal
Answer and see the solution →Crude oil takes millions of years to form. Suppose a layer of organic material is buried under sediment for 60 million years. If the process began 350 million years ago, calculate how many years ago the crude oil finished forming. Show your working.
Question 12
3 marks · Normal
Answer and see the solution →Explain why crude oil can be separated by physical methods, and not by chemical methods.
Question 13
4 marks · Normal
Answer and see the solution →A table below shows the amount of sulfur dioxide and carbon dioxide released by burning different fuels:
Fuel Sulfur dioxide released (g) Carbon dioxide released (g) Petrol 7 115 Diesel 20 124 Natural gas 0 95 (a)[1 mark]Which fuel releases the most sulfur dioxide? State your answer.
(b)[1 mark]Which fuel produces no sulfur dioxide? State your answer.
(c)[1 mark]Suggest one environmental problem caused by the fuel that releases the most carbon dioxide.
(d)[1 mark]Explain why environmental authorities may prefer natural gas over diesel.
Question 14
1 mark · Normal
Answer and check →Which statement best describes how crude oil forms?
- A.It forms rapidly when magma cools on the Earth's surface.
- B.It develops from the soft tissue of sea plants and animals buried under sediment over millions of years.
- C.It is created by freezing natural gas in the Arctic regions.
- D.It is made in laboratories by combining carbon and hydrogen gases.
Question 15
2 marks · Normal
Answer and see the solution →Give two differences between small and large hydrocarbon molecules found in crude oil.
Question 16
4 marks · Normal
Answer and see the solution →Burning fuels from crude oil can cause environmental problems. Answer all parts.
(a)[1 mark]State one pollutant formed when sulfur-containing hydrocarbons are burned.
(b)[1 mark]Describe how this pollutant can harm the environment.
(c)[1 mark]Suggest one method to reduce the formation of this pollutant.
(d)[1 mark]Explain why replacing large hydrocarbon fuels with smaller ones can reduce air pollution.
Question 17
2 marks · Hard
Answer and see the solution →Explain how burning fuels derived from crude oil can contribute to acid rain. Include the names of the main gases involved.
Question 18
5 marks · Hard
Answer and see the solution →Crude oil formed over millions of years from the remains of organisms.
(a)[2 marks]Describe what happened to the dead sea plants and animals that led to the formation of crude oil.
(b)[2 marks]State two conditions necessary for crude oil to form from these remains.
(c)[1 mark]Explain why crude oil is considered a non-renewable resource.
Question 19
2 marks · Hard
Answer and see the solution →State what crude oil is composed of. Name the two elements found in all hydrocarbons in crude oil.
Question 20
1 mark · Easy
Answer and see the solution →State one physical property that changes as the number of carbon atoms in a hydrocarbon increases.