Fuels — Paper 2 · IGCSE Science - Combined 0653

18 In which change is chemical energy transformed into heat (thermal energy)? A combustion of refinery gas B cracking of alkanes into alkenes C distillation of seawater D electrolysis of molten lead(II) bromide

1 marks

Answer: A

This question in 0653/22 Feb/March 2017

27 Which statement about the products of the fractional distillation of petroleum is not correct? A Fractions obtained from high up the fractional distillation column have low boiling points. B Fractions obtained from low down the fractional distillation column contain large molecules. C Large molecules have weak intermolecular attractive forces. D Refinery gas is used for heating and cooking.

1 marks

Answer: C

This question in 0653/21 May/June 2017

27 Petroleum is separated into different fractions by fractional distillation. Which statement about fractional distillation is not correct? A Larger molecules have stronger covalent bonds between their atoms. B The boiling point of hydrocarbons increases with the size of the molecules. C The different fractions have different boiling points. D The smaller molecules have weaker intermolecular attractive forces between them.

1 marks

Answer: A

This question in 0653/22 May/June 2017

27 In the fractional distillation of petroleum, fractions X and Y are removed at the positions shown. fraction X fraction Y petroleum Which row describes the molecular sizes and the intermolecular attractive forces in fractions X and Y? molecular sizes intermolecular attractive forces A X larger than Y X greater than Y B X larger than Y Y greater than X C Y larger than X X greater than Y D Y larger than X Y greater than X

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2017

27 Which statement about the fractional distillation of petroleum is not correct? A Fractions obtained from higher up the fractional distillation column have higher boiling point ranges. B Fractions obtained from lower down the fractional distillation column contain larger molecules. C Refinery gas is used for heating and cooking. D Smaller molecules have weaker intermolecular attractive forces.

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2017

27 The fractional distillation of petroleum is shown. fraction refinery gas gasoline paraffin light gas oil diesel lubricating oil petroleum bitumen Which fraction contains molecules with the largest intermolecular attractive forces? A bitumen B diesel C gasoline D refinery gas

1 marks

Answer: A

This question in 0653/22 May/June 2018

26 Gasoline is a hydrocarbon fuel obtained from petroleum. Which statement is correct? A Gasoline burns to form carbon dioxide and water. B Gasoline contains the elements carbon, hydrogen and oxygen. C Gasoline is used as a fuel in diesel engines. D The combustion of gasoline is an endothermic reaction.

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2018

26 Gasoline is a hydrocarbon fuel obtained from petroleum. Which statement is correct? A Gasoline burns to form carbon dioxide and water. B Gasoline contains the elements carbon, hydrogen and oxygen. C Gasoline is used as a fuel in diesel engines. D The combustion of gasoline is an endothermic reaction.

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2018

27 Petroleum is separated into fractions by fractional distillation. Which labelled fraction contains molecules with the largest intermolecular attractive forces? A B C D petroleum

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2018

26 Gasoline is a hydrocarbon fuel obtained from petroleum. Which statement is correct? A Gasoline burns to form carbon dioxide and water. B Gasoline contains the elements carbon, hydrogen and oxygen. C Gasoline is used as a fuel in diesel engines. D The combustion of gasoline is an endothermic reaction.

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2018

26 Which of hydrogen, petroleum and wood are fossil fuels? hydrogen petroleum wood A J J J B v x x Cc x Jv x D x x J

1 marks

Answer: C

This question in 0653/22 Feb/March 2019

25 Which statement shows that petroleum is a mixture? A Petroleum can be burned as a fuel. B Petroleum can be separated into fractions by distillation. C Petroleum is a fossil fuel formed over millions of years. D Petroleum is a thick, black liquid.

1 marks

Answer: B

This question in 0653/21 May/June 2019

27 Which row identifies the temperature used and describes the change to the alkane molecules during the cracking process? temperature change to the / °C alkane molecules A 100 become larger B 100 become smaller C 500 become larger D 500 become smaller

1 marks

Answer: D

This question in 0653/22 May/June 2019

25 Which statement shows that petroleum is a mixture? A Petroleum can be burned as a fuel. B Petroleum can be separated into fractions by distillation. C Petroleum is a fossil fuel formed over millions of years. D Petroleum is a thick, black liquid.

1 marks

Answer: B

This question in 0653/23 May/June 2019

27 Which statement about cracking is not correct? A A high temperature and a catalyst are used. B Alkenes are made. C Hydrogen can be made. D Larger alkanes are made from smaller alkanes.

1 marks

Answer: D

This question in 0653/23 May/June 2019

27 Which statement about fractions obtained from petroleum is not correct? A Different fractions have different boiling points. B Gasoline contains molecules of only one hydrocarbon. C Molecules in diesel oil are smaller than molecules in bitumen. D Naphtha is used as a feedstock for making chemicals.

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2019

26 Gasoline is one fraction obtained from petroleum. Which row describes the boiling point of the compounds and the molecules in this fraction? boiling point molecules A they have different boiling points they contain different numbers of carbon atoms B they have different boiling points they contain the same number of carbon atoms C they have the same boiling point they contain different numbers of carbon atoms D they have the same boiling point they contain the same number of carbon atoms

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2019

26 A simple fractionating column is shown. fraction 1 fraction 2 fraction 3 fraction 4 petroleum Which statement about the fractions is correct? A Fraction 1 contains compounds with the highest boiling points. B Fraction 2 contains larger hydrocarbon molecules than fraction 3. C Fraction 3 is more viscous than fraction 4. D Fraction 4 is the least flammable.

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2019

27 What is formed during the complete combustion of a hydrocarbon? A carbon dioxide and water B carbon dioxide and hydrogen C carbon monoxide and carbon dioxide D carbon monoxide and water

1 marks

Answer: A

This question in 0653/22 Feb/March 2020

27 Petroleum is separated into useful fractions by fractional distillation. Which statement about the fractions is correct? A All the fractions are used as fuels. B Bitumen has the strongest attractive forces between molecules. C Gasoline contains the largest molecules. D Refinery gas is the least volatile.

1 marks

Answer: B

This question in 0653/21 May/June 2020

27 The fractional distillation of petroleum is shown. refinery gas gasoline paraffin light gas oil diesel lubricating oil petroleum bitumen Which fraction contains molecules that have the largest attractive forces? A bitumen B diesel C gasoline D refinery gas

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2021

27 The fractional distillation of petroleum is shown. refinery gas gasoline paraffin light gas oil diesel lubricating oil petroleum bitumen Which fraction contains molecules that have the largest attractive forces? A bitumen B diesel C gasoline D refinery gas

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2021

27 The fractional distillation of petroleum is shown. refinery gas gasoline paraffin light gas oil diesel lubricating oil petroleum bitumen Which fraction contains molecules that have the largest attractive forces? A bitumen B diesel C gasoline D refinery gas

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2021

26 Methane, ethane and propane are all alkanes. Their formulae are shown. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three compounds are hydrocarbons. B All three compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

1 marks

Answer: D

This question in 0653/21 May/June 2022

25 Naphtha and diesel oil are two fractions obtained from the fractional distillation of petroleum. Which statement about naphtha and diesel oil is correct? A Molecules in naphtha are smaller than molecules in diesel oil. B Naphtha has a higher boiling point range than diesel oil. C Naphtha is less volatile than diesel oil. D Naphtha is removed from the fractionating column at a lower level than diesel oil.

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2022

25 Bitumen and gasoline are fractions obtained from petroleum by fractional distillation. Which statement explains why the boiling range of the bitumen fraction is higher than the boiling range of the gasoline fraction? A It contains smaller molecules. B It leaves the fractional distillation column at the bottom. C Its molecules have greater forces of attraction. D Its molecules have stronger covalent bonds.

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2022

26 The formula of the hydrocarbon octane is C8H18. What are the products of the complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2022

27 Which products are obtained by the cracking of larger alkane molecules? A smaller alkane molecules, smaller alkene molecules and hydrogen B smaller alkane molecules only C smaller alkene molecules and hydrogen only D smaller alkene molecules only

1 marks

Answer: A

This question in 0653/21 May/June 2024

27 A hydrocarbon with the formula C9H20 is cracked to form one molecule of ethene and two other hydrocarbon molecules. What are the two other molecules? A C4H10 and C3H8 B C4H8 and C3H8 C C4H8 and C3H6 D C7H14 and H2

1 marks

Answer: B

This question in 0653/22 May/June 2024

27 Q, R and S are fossil fuels. The main constituent of Q is methane. R is a source of diesel oil and bitumen. S is burned in car engines. Which row identifies Q, R and S? Q R S A natural gas gasoline petroleum B natural gas petroleum gasoline C coal gasoline petroleum D coal petroleum gasoline

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2024

24 Which process is a physical change? A combustion of solid carbon B cracking of an alkane to give an alkene C fractional distillation of petroleum D rusting of iron

1 marks

Answer: C

This question in 0653/22 May/June 2025

26 Which row describes the properties of fractions obtained from petroleum, from the bottom of the fractionating column to the top? chain lengths boiling points A decrease decrease B decrease increase C increase decrease D increase increase

1 marks

Answer: A

This question in 0653/23 May/June 2025

22 Petroleum is a mixture of hydrocarbons. Which method is used to separate these hydrocarbons? A crystallisation B filtration C fractional distillation D simple distillation

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2025

16 Which process is a physical change? A addition of carbon dioxide to limewater B addition of sodium to water C electrolysis of molten lead(II) bromide D separation of petroleum by fractional distillation

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2025