Redox — Paper 2 · IGCSE Physical Science 0652

8 The diagram shows wood burning in air. Which two words describe what happens to the wood and the type of reaction taking place? wood is type of reaction A oxidised endothermic B oxidised exothermic C reduced endothermic D reduced exothermic

1 marks

Answer: B

This question in 0652/21 Oct/Nov 2017

15 One of the reactions that occurs in a blast furnace is shown. Fe2O3 + 3CO → 2Fe + 3CO2 Which substance is the reducing agent? A CO B CO2 C Fe D Fe2O3

1 marks

Answer: A

This question in 0652/21 Oct/Nov 2017

17 Nitrogen oxides are produced in a car engine. Which process describes how the nitrogen oxides are catalytically removed in the exhaust fumes? A combustion B oxidation C reduction D thermal decomposition

1 marks

Answer: C

This question in 0652/21 Oct/Nov 2017

8 The diagram shows wood burning in air. Which two words describe what happens to the wood and the type of reaction taking place? wood is type of reaction A oxidised endothermic B oxidised exothermic C reduced endothermic D reduced exothermic

1 marks

Answer: B

This question in 0652/22 Oct/Nov 2017

15 One of the reactions that occurs in a blast furnace is shown. Fe2O3 + 3CO → 2Fe + 3CO2 Which substance is the reducing agent? A CO B CO2 C Fe D Fe2O3

1 marks

Answer: A

This question in 0652/22 Oct/Nov 2017

17 Nitrogen oxides are produced in a car engine. Which process describes how the nitrogen oxides are catalytically removed in the exhaust fumes? A combustion B oxidation C reduction D thermal decomposition

1 marks

Answer: C

This question in 0652/22 Oct/Nov 2017

9 Photographic film is coated with a layer of silver salts that contain silver ions. Some photographic film is exposed to light. Which row describes the colour change and the reaction of the silver ions? colour change reaction of silver ions A turns black oxidised to silver B turns black reduced to silver C turns white oxidised to silver D turns white reduced to silver

1 marks

Answer: B

This question in 0652/21 Oct/Nov 2018

10 Which reaction is an oxidation? A 2SO2 + O2 → 2SO3 B NaOH + HCl → NaCl + H2O C CaCO3 → CaO + CO2 D NH3 + HCl → NH4Cl

1 marks

Answer: A

This question in 0652/21 Oct/Nov 2018

9 Photographic film is coated with a layer of silver salts that contain silver ions. Some photographic film is exposed to light. Which row describes the colour change and the reaction of the silver ions? colour change reaction of silver ions A turns black oxidised to silver B turns black reduced to silver C turns white oxidised to silver D turns white reduced to silver

1 marks

Answer: B

This question in 0652/22 Oct/Nov 2018

10 Which reaction is an oxidation? A 2SO2 + O2 → 2SO3 B NaOH + HCl → NaCl + H2O C CaCO3 → CaO + CO2 D NH3 + HCl → NH4Cl

1 marks

Answer: A

This question in 0652/22 Oct/Nov 2018

8 The equation for the reaction of magnesium with copper(II) oxide is shown. CuO + Mg → MgO + Cu Which statement is correct? A Copper(II) oxide is oxidised. B Copper(II) oxide is reduced. C Magnesium oxide is oxidised. D Magnesium oxide is reduced.

1 marks

Answer: B

This question in 0652/21 Oct/Nov 2019

14 Which reaction in the extraction of iron from hematite is not a redox reaction? A C + O2 → CO2 B C + CO2 → 2CO C CaCO3 → CaO + CO2 D Fe2O3 + 3CO → 2Fe + 3CO2

1 marks

Answer: C

This question in 0652/21 Oct/Nov 2019

8 The equation for the reaction of magnesium with copper(II) oxide is shown. CuO + Mg → MgO + Cu Which statement is correct? A Copper(II) oxide is oxidised. B Copper(II) oxide is reduced. C Magnesium oxide is oxidised. D Magnesium oxide is reduced.

1 marks

Answer: B

This question in 0652/22 Oct/Nov 2019

14 Which reaction in the extraction of iron from hematite is not a redox reaction? A C + O2 → CO2 B C + CO2 → 2CO C CaCO3 → CaO + CO2 D Fe2O3 + 3CO → 2Fe + 3CO2

1 marks

Answer: C

This question in 0652/22 Oct/Nov 2019

10 Word equations for two reactions are shown. zinc oxide + carbon  zinc + carbon monoxide iron + copper oxide  copper + iron oxide Which statement about the two reactions is correct? A Carbon and copper oxide have been oxidised. B Carbon and iron have been reduced. C Zinc oxide and copper oxide have been oxidised. D Zinc oxide and copper oxide have been reduced.

1 marks

Answer: D

This question in 0652/21 Oct/Nov 2020

15 Iron is produced from iron oxide using a redox reaction. The equation for the reaction is shown. Fe2O3 + 3CO  2Fe + 3CO2 Which statement about this reaction is correct? A Carbon dioxide is oxidised. B Carbon monoxide is reduced. C Iron is oxidised. D Iron oxide is reduced.

1 marks

Answer: D

This question in 0652/21 Oct/Nov 2020

17 Nitrogen oxides are produced in a car engine. Which type of reaction catalytically removes nitrogen oxides from the exhaust fumes? A combustion B oxidation C reduction D thermal decomposition

1 marks

Answer: C

This question in 0652/21 Oct/Nov 2020

10 Word equations for two reactions are shown. zinc oxide + carbon  zinc + carbon monoxide iron + copper oxide  copper + iron oxide Which statement about the two reactions is correct? A Carbon and copper oxide have been oxidised. B Carbon and iron have been reduced. C Zinc oxide and copper oxide have been oxidised. D Zinc oxide and copper oxide have been reduced.

1 marks

Answer: D

This question in 0652/22 Oct/Nov 2020

17 Nitrogen oxides are produced in a car engine. Which type of reaction catalytically removes nitrogen oxides from the exhaust fumes? A combustion B oxidation C reduction D thermal decomposition

1 marks

Answer: C

This question in 0652/22 Oct/Nov 2020

8 Molten lead(II) bromide is electrolysed using inert electrodes. Which row identifies the product and the reaction occurring at the cathode? product reaction at the cathode A bromine bromide ions gain electrons B bromine bromide ions lose electrons C lead lead ions gain electrons D lead lead ions lose electrons

1 marks

Answer: C

This question in 0652/21 Oct/Nov 2021

9 Which row describes what happens to the ions at each electrode during electrolysis? anode cathode A gain of electrons loss of electrons B gain of electrons gain of electrons C loss of electrons loss of electrons D loss of electrons gain of electrons

1 marks

Answer: D

This question in 0652/21 Oct/Nov 2023

12 Lead is extracted from its ore using carbon monoxide. The equation is shown. PbO + CO → Pb + CO2 Which statement explains what happens to the lead atoms and carbon atoms in the reactants? A Lead and carbon are oxidised. B Lead and carbon are reduced. C Lead is oxidised and carbon is reduced. D Lead is reduced and carbon is oxidised.

1 marks

Answer: D

This question in 0652/21 Oct/Nov 2023

9 Which row describes what happens to the ions at each electrode during electrolysis? anode cathode A gain of electrons loss of electrons B gain of electrons gain of electrons C loss of electrons loss of electrons D loss of electrons gain of electrons

1 marks

Answer: D

This question in 0652/22 Oct/Nov 2023

12 Lead is extracted from its ore using carbon monoxide. The equation is shown. PbO + CO  Pb + CO2 Which statement explains what happens to the lead atoms and carbon atoms in the reactants? A Lead and carbon are oxidised. B Lead and carbon are reduced. C Lead is oxidised and carbon is reduced. D Lead is reduced and carbon is oxidised.

1 marks

Answer: D

This question in 0652/22 Oct/Nov 2023

11 Which row about oxidation reactions is correct? oxidation oxidising agent A gain of oxygen loses oxygen B gain of oxygen gains oxygen C loss of oxygen loses oxygen D loss of oxygen gains oxygen

1 marks

Answer: A

This question in 0652/21 Oct/Nov 2024