Physical and chemical changes — Paper 2 · IGCSE Science - Combined 0653

27 Which process is an example of thermal decomposition? A cracking an alkane B electrolysis of molten lead(II) bromide C extraction of iron in a blast furnace D fractional distillation of petroleum

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2017

16 Which substances react to produce a mixture of an element and a compound? A copper oxide and carbon B hydrochloric acid and sodium carbonate C hydrogen and oxygen D nitric acid and sodium hydroxide

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2017

16 Some changes are listed. 1 boiling 2 decomposing 3 evaporating 4 oxidising Which changes are physical changes? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: B

This question in 0653/21 May/June 2018

16 Which process involves a physical change? A adding magnesium to nitric acid B burning methane C evaporating petroleum D rusting iron

1 marks

Answer: C

This question in 0653/22 May/June 2018

26 Which process produces a gas that contributes to climate change? A the electrolysis of molten lead(II) bromide B the reaction of calcium with water C the reaction of copper oxide with dilute sulfuric acid D the thermal decomposition of calcium carbonate

1 marks

Answer: D

This question in 0653/22 May/June 2018

16 Which process is not a chemical change? A the electrolysis of molten lead bromide B the fractional distillation of petroleum C the oxidation of copper D the rusting of iron

1 marks

Answer: B

This question in 0653/23 May/June 2018

15 Four processes are listed. 1 melting of ice 2 electrolysis of molten lead(II) bromide 3 combustion of carbon 4 rusting of iron Which processes are chemical changes? A 1 and 3 only B 1, 2 and 3 C 2 and 4 only D 2, 3 and 4

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2019

15 In which experiment is a compound formed? A B copper oxide filter paper + water filter funnel ink C D air aqueous hydrogen sodium chloride burning heat

1 marks

Answer: C

This question in 0653/22 May/June 2020

15 What is an example of a physical change? A carbon dioxide turning limewater milky B the crystallisation of copper(II) sulfate from solution C the electrolysis of molten lead(II) bromide D the thermal decomposition of calcium carbonate

1 marks

Answer: B

This question in 0653/21 May/June 2021

15 What is an example of a physical change? A carbon dioxide turning limewater milky B the crystallisation of copper(II) sulfate from solution C the electrolysis of molten lead(II) bromide D the thermal decomposition of calcium carbonate

1 marks

Answer: B

This question in 0653/22 May/June 2021

16 What is an example of a physical change? A carbon dioxide turning limewater milky B the crystallisation of copper(II) sulfate from solution C the electrolysis of molten lead(II) bromide D the thermal decomposition of calcium carbonate

1 marks

Answer: B

This question in 0653/23 May/June 2021

19 Steam condenses to form liquid water. Which row shows the type of reaction and the energy level diagram for this change? type of reaction energy level diagram liquid water energy A endothermic steam progress of reaction steam energy B endothermic liquid water progress of reaction steam energy C exothermic liquid water progress of reaction liquid water energy D exothermic steam progress of reaction

1 marks

Answer: C

This question in 0653/22 Feb/March 2022

14 Which row describes a chemical change? test result A one end of a piece of aluminium is heated the other end gets hot B calcium carbonate is heated carbon dioxide is made C a piece of iron is heated it becomes more malleable D a beaker of water is heated steam is made

1 marks

Answer: B

This question in 0653/21 May/June 2022

14 Three changes are listed. 1 Dilute hydrochloric acid is reacted with aqueous sodium hydroxide. 2 The mixture formed is then heated until all of the water is evaporated. 3 The solid that is formed is then heated until it melts. Which row describes changes 1, 2 and 3? 1 2 3 A chemical chemical physical B chemical physical physical C physical physical chemical D physical chemical chemical

1 marks

Answer: B

This question in 0653/22 May/June 2022

14 When solid sodium carbonate is added to dilute hydrochloric acid, it dissolves and carbon dioxide is given off. Which statement is correct? A This is a chemical change because sodium carbonate dissolves. B This is a chemical change because the acid reacts with sodium carbonate. C This is a physical change because sodium carbonate dissolves. D This is a physical change because the acid reacts with sodium carbonate.

1 marks

Answer: B

This question in 0653/23 May/June 2022

27 Which process is an example of thermal decomposition? A cracking an alkane B electrolysis of molten lead(II) bromide C extraction of iron in the blast furnace D fractional distillation of petroleum

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2022

27 Which process is an example of thermal decomposition? A cracking an alkane B electrolysis of molten lead(II) bromide C extraction of iron in the blast furnace D fractional distillation of petroleum

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2022

15 What is an example of a physical change? A carbon dioxide turning limewater milky B the crystallisation of copper(II) sulfate from solution C the electrolysis of molten lead(II) bromide D the thermal decomposition of calcium carbonate

1 marks

Answer: B

This question in 0653/21 May/June 2024

15 Which process is not a chemical change? A electrolysis of molten lead bromide B fractional distillation of petroleum C oxidation of copper D rusting of iron

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2024

22 Which processes involve a chemical change? 1 cracking of an alkane 2 polymerisation of ethene 3 corrosion of iron A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 0653/21 May/June 2025

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

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