Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Metals below carbon in the reactivity series
19 practice questions
Practice questions
11–19 of 19
Question 11
3 marks · Normal
Answer and see the solution →A sample of iron(III) oxide, Fe2O3, weighing 8.0 g is to be reduced by carbon monoxide according to the balanced equation:
Calculate the maximum mass of iron that can be obtained from the sample. (Relative atomic masses: Fe = 56, O = 16)
Question 12
3 marks · Normal
Answer and see the solution →Explain why metals below carbon in the reactivity series, such as zinc and iron, are extracted by reduction with carbon, but metals above carbon are not.
Question 13
4 marks · Normal
Answer and see the solution →The table shows some metals and their relative position in the reactivity series.
Part of the reactivity series Metal Position (1 = most reactive) Potassium 1 Zinc 6 Iron 7 Copper 10 (a)[2 marks]Identify which of these metals can be extracted from its oxide using carbon.
(b)[2 marks]Give a reason for your answer.
Question 14
1 mark · Normal
Answer and check →Which of the following correctly describes the extraction of iron from iron(III) oxide in a blast furnace?
- A.Iron(III) oxide is reduced by carbon monoxide.
- B.Iron(III) oxide is reduced by hydrogen.
- C.Iron(III) oxide is electrolysed to form iron.
- D.Iron(III) oxide is oxidised by carbon.
Question 15
2 marks · Normal
Answer and see the solution →Explain, using the concept of reduction, what happens to iron ions during extraction from iron(III) oxide.
Question 16
4 marks · Normal
Answer and see the solution →(a)[2 marks]Describe one economic advantage of extracting iron by heating with carbon rather than by electrolysis.
(b)[2 marks]The chemical equation for extracting iron using carbon is:
In this reaction, state which substance is oxidised and which is reduced.
Question 17
2 marks · Hard
Answer and see the solution →State what is meant by 'reduction' in the extraction of metals from metal oxides. Give your answer in terms of both oxygen and electrons.
Question 18
5 marks · Hard
Answer and see the solution →The table shows the position of three metals in the reactivity series:
Metal Position relative to carbon Lead Below carbon Aluminium Above carbon Zinc Below carbon A manufacturer wants to extract each metal from its oxide using the cheapest method.
(a)[2 marks]State which two of these metals can be extracted from their oxides by heating with carbon. Explain your answer using the reactivity series.
(b)[2 marks]Aluminium oxide is not extracted by heating with carbon. Explain why not, and name the method used instead.
(c)[1 mark]Write a balanced symbol equation for the extraction of zinc from zinc oxide using carbon.
Question 19
2 marks · Hard
Answer and see the solution →Explain why extraction of iron using carbon is more economical than extraction using electrolysis. Give two reasons.