Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
41–50 of 133 · Hard
Question 41
2 marks · Hard
Answer and see the solution →Refinery gases are separated out from crude oil in oil refineries. State one typical use of refinery gases for industry and one for the home.
Question 42
5 marks · Hard
Answer and see the solution →Gasoline (petrol) is an important product of crude oil refining.
(a)[1 mark]State the main use of gasoline.
(b)[2 marks]Explain why gasoline is suitable for its main application. Give two reasons.
(c)[2 marks]Another fraction from crude oil is kerosene. Compare the main use of kerosene with that of gasoline.
Question 43
2 marks · Hard
Answer and see the solution →State two different typical uses of refinery gases, other than as domestic heating fuel.
Question 44
2 marks · Hard
Answer and see the solution →State two typical uses of kerosene, choosing each use from a different everyday context.
Question 45
5 marks · Hard
Answer and see the solution →Kerosene is an important hydrocarbon fraction obtained from crude oil. It is commonly used in different everyday situations.
(a)[1 mark]State one use of kerosene in transport.
(b)[1 mark]State one use of kerosene in the home.
(c)[1 mark]Describe another use of kerosene, not related to transport or the home.
(d)[2 marks]For one of the uses you have stated, explain briefly why kerosene is suitable for that purpose.
Question 46
2 marks · Hard
Answer and see the solution →Kerosene is widely used as a fuel in different settings. State one typical use of kerosene in transport and one typical use in buildings.
Question 47
7 marks · Hard
Answer and see the solution →Fuels made from crude oil are widely used for transport and heating. The environmental impacts of using these fuels are an important concern.
(a)[3 marks]Explain how burning fuels obtained from crude oil can contribute to the formation of acid rain. In your answer, refer to any gases released and their effects.
(b)[2 marks]Name one use of kerosene and explain why air pollution from this use might be a concern in large cities.
(c)[2 marks]Describe one way that reducing the use of kerosene as a fuel could help the environment.
Question 48
7 marks · Hard
Answer and see the solution →Crude oil is essential to our way of life and one of its products, kerosene, is widely used.
(a)[3 marks]State what crude oil is mainly composed of, and explain what hydrocarbons are.
(b)[2 marks]Describe two properties of hydrocarbon molecules found in kerosene that make them suitable for use as fuel in jet engines.
(c)[2 marks]Give one typical use of kerosene.
Question 49
7 marks · Hard
Answer and see the solution →Crude oil is an important natural resource formed over millions of years and separated into different fractions for various uses, including kerosene.
(a)[3 marks]Describe the process by which crude oil forms from ancient sea plants and animals over millions of years. Include two different physical factors essential to this process.
(b)[2 marks]State what kerosene is used for. Give two different uses.
(c)[2 marks]Explain why kerosene, as a fraction of crude oil, is useful for these applications, referring to its physical properties.
Question 50
2 marks · Hard
Answer and see the solution →The molecular formula for an alkane with 16 carbon atoms is C₁₆H₃₄. State the general formula for alkanes. Using this formula, explain how you can determine the number of hydrogen atoms in any unbranched alkane.