Fuels — Paper 2 · IGCSE Chemistry (9-1) 0971

31 Ammonia is manufactured by reacting hydrogen with nitrogen in the Haber process. Which row describes the sources of hydrogen and nitrogen and the conditions used in the manufacture of ammonia in the Haber process? source of source of temperature of pressure of hydrogen nitrogen reaction / °C reaction / atm A air natural gas 250 2 B air natural gas 250 200 C natural gas air 450 2 D natural gas air 450 200

1 marks

Answer: D

This question in 0971/21 May/June 2018

35 What is not the correct use of the fraction named? name of fraction use A fuel oil making waxes B gas oil fuel in diesel engines C kerosene jet fuel D naphtha making chemicals

1 marks

Answer: A

This question in 0971/21 May/June 2018

37 Which substances can be obtained by cracking hydrocarbons? A ethanol and ethene B ethanol and hydrogen C ethene and hydrogen D ethene and poly(ethene)

1 marks

Answer: C

This question in 0971/21 May/June 2018

35 Which fuel could be gasoline? Is it obtained from petroleum? yes no Is it used as Is it used as fuel for cars? fuel for cars? yes no yes no A B C D

1 marks

Answer: A

This question in 0971/21 May/June 2019

36 Some fractions obtained from petroleum are listed. position collected fraction use in the fractionating column 1 gasoline waxes and polishes below refinery gas 2 bitumen making roads above kerosene 3 kerosene jet fuel below gasoline 4 refinery gas heating and cooking above gasoline Which rows are correct? A 1, 3 and 4 B 2, 3 and 4 C 3 and 4 only D 4 only

1 marks

Answer: C

This question in 0971/22 Oct/Nov 2019

37 Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? less energy more energy released released A ethene ethane methane B ethene methane ethane C methane ethane ethene D methane ethene ethane

1 marks

Answer: D

This question in 0971/21 May/June 2020

35 Ethanol is made on an industrial scale by the fermentation of sugars or by the reaction of ethene with steam in the presence of a suitable catalyst. What is a disadvantage of making ethanol from ethene rather than by fermentation? A A continuous production process is used. B A non-renewable raw material is used. C The product is very pure. D The rate of reaction is very high.

1 marks

Answer: B

This question in 0971/22 May/June 2020

37 Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? less energy more energy released released A ethene ethane methane B ethene methane ethane C methane ethane ethene D methane ethene ethane

1 marks

Answer: D

This question in 0971/22 May/June 2020

16 Which substance does not require oxygen in order to produce energy? A coal B hydrogen C natural gas D 235U

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2020

12 Four different fuels are used to heat a beaker of water, for the same amount of time, using the apparatus shown. thermometer stirrer screen to reduce draughts 200 g of water spirit burner fuel The initial temperature of the water and the temperature after heating by the fuel are recorded. Which fuel releases the most heat energy? initial temperature temperature after / C heating / C A 17 46 B 24 52 C 26 61 D 30 62

1 marks

Answer: C

This question in 0971/22 May/June 2021

14 Which statements about hydrogen are correct? 1 When hydrogen is burned, heat energy is released. 2 When hydrogen is used in a fuel cell, electrical energy is generated. 3 When hydrogen is used as a fuel, water is the only product. A 1, 2 and 3 B 1 and 2 only C 1 only D 3 only

1 marks

Answer: A

This question in 0971/22 Oct/Nov 2021

34 Fuel X produces carbon dioxide and water when it is burned in air. So does fuel Y. What could X and Y be? X Y A C H2 B C C8H18 C CH4 H2 D CH4 C8H18

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2021

36 Ethanol is made industrially by the fermentation of glucose or by the catalytic addition of steam to ethene. Which statement describes an advantage of fermentation compared to catalytic addition? A Ethanol is the only product of fermentation. B Fermentation uses a batch process but catalytic addition is continuous. C Fermentation uses a higher temperature than catalytic addition. D Fermentation uses a renewable resource.

1 marks

Answer: D

This question in 0971/21 May/June 2022

37 Alkenes can be produced by cracking large hydrocarbon molecules to form smaller hydrocarbon molecules. Which equations represent possible reactions when tetradecane, C14H30, is cracked? 1 C14H30  C2H6 + C3H6 + C4H8 + C5H10 2 C14H30  H2 + C2H4 + C3H6 + C4H8 + C5H10 3 C14H30  C2H6 + 4C3H6 4 C14H30  C2H6 + C3H8 + C9H18 A 1 only B 1 and 4 C 1, 2 and 3 D 3 and 4

1 marks

Answer: C

This question in 0971/22 May/June 2022

12 Some properties of four fuels are shown. Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air? melting point boiling point fuel formula / C / C A hydrogen H2 –259 –253 B methane CH4 –182 –164 C octane C8H18 –57 126 D wax C31H64 60 400

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2022

34 The fractional distillation of petroleum is shown. Which fraction contains hydrocarbons with the longest chain length? fuel gas A B C D petroleum bitumen

1 marks

Answer: D

This question in 0971/21 May/June 2023

29 A wax candle is made from a mixture of hydrocarbons. The candle is lit and placed in a gas jar along with a strip of cobalt(II) chloride test paper as shown. cobalt(II) chloride paper gas jar combustion products wax candle After a short time, the oxygen in the jar is used up and the candle flame goes out. Which substance does the cobalt(II) chloride paper identify? A carbon dioxide B carbon monoxide C sulfur dioxide D water

1 marks

Answer: D

This question in 0971/22 May/June 2023

36 What is a disadvantage of producing ethanol using the catalytic addition of steam to ethene? A the energy cost is low B the process is continuous C the process uses a non-renewable raw material D the ethanol is pure

1 marks

Answer: C

This question in 0971/21 May/June 2024

38 What is an advantage of manufacturing ethanol by fermentation rather than by the addition of steam to ethene? A No gases that cause global warming are produced. B The ethanol that is produced is pure. C Fermentation is a fast process. D Fermentation uses renewable raw materials.

1 marks

Answer: D

This question in 0971/22 May/June 2024

30 Which statement is correct? A Bitumen is used as a fuel for ships. B Coal, natural gas and oxygen are all fuels. C Hydrogen is the main constituent of natural gas. D Petroleum is separated into useful substances by fractional distillation.

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2024

34 The table shows two methods used to make ethanol. conditions source type of method temperature pressure of raw process catalyst / C / atm material fermentation batch 35 1 yeast sugar cane adding steam continuous 300 60 acid petroleum to ethene Which statement gives an advantage of preparing ethanol by fermentation rather than by adding steam to ethene? A Fermentation takes several days to complete. B Little energy is used in the fermentation process. C The fermentation of glucose from sugar cane produces pure ethanol. D Fermentation uses a non-renewable raw material.

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2024

34 Petroleum can be separated into useful fractions by fractional distillation. Which row shows a correct use of the named fraction? fraction use A bitumen lubricant B naphtha fuel for home heating C kerosene jet fuel D refinery gas making chemicals

1 marks

Answer: C

This question in 0971/22 May/June 2025

36 Which row shows the products obtained by the cracking of a large alkane? alkene hydrogen water v v v key /=yes 0 0O WwW > J Jv x Jv x Jv X=no x Jv J

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2025