Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Displacement reactions involving metal oxides
20 practice questions
Practice questions
11–20 of 20
Question 11
3 marks · Normal
Answer and see the solution →Zinc oxide can be reduced using carbon:
If you start with 16.2 grams of zinc oxide (ZnO), calculate the maximum mass of zinc metal that can be obtained. (Relative atomic masses: Zn = 65, O = 16, C = 12)
Question 12
3 marks · Normal
Answer and see the solution →Iron(III) oxide reacts with aluminium powder in a competition (thermite) reaction. Aluminium is above iron in the reactivity series.
Explain, in terms of reactivity, why aluminium can remove oxygen from iron(III) oxide but iron cannot remove oxygen from aluminium oxide.
Question 13
2 marks · Normal
Answer and see the solution →A student carries out experiments to determine the order of reactivity of four metals: potassium, zinc, aluminium, and iron. Write the correct order of these four metals in a reactivity series from most to least reactive.
Question 14
4 marks · Normal
Answer and see the solution →Answer the following about redox reactions and agents.
(a)[1 mark]State what is meant by oxidation.
(b)[1 mark]State what is meant by reduction.
(c)[1 mark]Explain what an oxidising agent does in a reaction.
(d)[1 mark]Give the definition of a reducing agent.
Question 15
3 marks · Normal
Answer and see the solution →Iron(III) oxide can be reduced by aluminium in a displacement reaction:
Calculate the maximum mass of iron produced if 8.0 g of iron(III) oxide is reduced completely using this reaction. (Relative atomic masses: Fe = 56, Al = 27, O = 16)
Question 16
3 marks · Normal
Answer and see the solution →A student claims that aluminium can displace zinc from zinc oxide, but not iron from iron(III) oxide. Explain, based on the reactivity series, whether the student's claim is correct.
Question 17
4 marks · Normal
Answer and see the solution →The table shows the results when three metals are mixed with the oxides of the others and heated.
Mixture Reaction observed? Metal X + oxide of Y Yes Metal Y + oxide of Z No Metal Z + oxide of X No Metal Y + oxide of X No Metal Z + oxide of Y Yes (a)[2 marks]Which metal is the most reactive? Explain your reasoning.
(b)[2 marks]Which metal is the least reactive? Explain your answer.
Question 18
2 marks · Hard
Answer and see the solution →Copper(II) oxide reacts with a solid element X when heated, producing copper metal and a white solid. Element X cannot displace magnesium from magnesium oxide.
Question 19
5 marks · Hard
Answer and see the solution →A student heats powdered samples of four different metals (A, B, C, D) separately with iron(III) oxide. The results are shown:
Observations of reactions with iron(III) oxide Metal Observation with iron(III) oxide A A bright reaction. Grey metal formed. B No visible change. C Slow reaction with faint glow. Grey metal appeared. D No reaction even after strong heating. (a)[2 marks]Arrange the four metals (A, B, C, D) in order of their reactivity, from most reactive to least reactive, based on the observations above.
(b)[3 marks]Suggest what happens chemically when metal A reacts with iron(III) oxide. State which metal is reduced and which is oxidised.
Question 20
2 marks · Hard
Answer and see the solution →State what is meant by the term 'reducing agent' in a redox reaction, and give an example from a reaction involving metal oxides.