Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
201–210 of 785
Question 201
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 202
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 203
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 204
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 205
1 mark · Easy
Answer and see the solution →State one physical property that changes as the number of carbon atoms in a hydrocarbon increases.
Question 206
3 marks · Easy
Answer and see the solution →The table shows two hydrocarbon fractions obtained from crude oil.
(a)[1 mark]Hydrocarbon fractions Fraction Approx. number of carbon atoms Fuel gas 3 Lubricating oil 20 Which fraction is more viscous?
(b)[2 marks]Explain your answer to part (a).
Question 207
2 marks · Easy
Answer and see the solution →A scientist finds that a sample of kerosene starts to boil at 170 C, while a sample of diesel from the same crude oil boils at 280 C. Calculate the difference in boiling points between these two fractions.
Question 208
2 marks · Easy
Answer and see the solution →Explain why smaller hydrocarbons are used as fuels more often than larger hydrocarbons.
Question 209
3 marks · Easy
Answer and see the solution →The table shows information about three fractions from crude oil.
(a)[1 mark]Hydrocarbon fractions from crude oil Fraction Approx. number of carbon atoms Boiling point (°C) Petroleum gas 4 −1 Diesel 16 260 Bitumen 70 over 350 Which fraction is most volatile?
(b)[2 marks]Describe the relationship between the number of carbon atoms and boiling point for these fractions.
Question 210
1 mark · Easy
Answer and see the solution →State the colour of hydrocarbon fractions with the largest molecules.