Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Extraction and Uses of Metals
128 practice questions
Topics covered
- Extracting metals from their ores19 practice questions
- Metals below carbon in the reactivity series19 practice questions
- Metals above carbon in the reactivity series18 practice questions
- Properties and uses of some metals19 practice questions
- Uses of aluminium19 practice questions
- Properties and uses of different kinds of steel20 practice questions
Practice questions
11–20 of 50 · Easy
Question 11
2 marks · Easy
Answer and see the solution →Calculate the total number of moles of oxygen atoms removed when 1.0 mole of Fe2O3 is reduced using carbon monoxide.
Question 12
2 marks · Easy
Answer and see the solution →Explain, using the reactivity series, why copper can be extracted from copper(II) oxide by heating with carbon but magnesium cannot.
Question 13
3 marks · Easy
Answer and see the solution →The table shows the position of several metals in the reactivity series relative to carbon:
Metal Position in series Potassium above carbon Lead below carbon Iron below carbon Aluminium above carbon (a)[1 mark]Name two metals from the table that can be extracted by heating their oxides with carbon.
(b)[1 mark]Explain why potassium cannot be extracted by reduction with carbon.
(c)[1 mark]Suggest the method used to extract aluminium from aluminium oxide.
Question 14
1 mark · Easy
Answer and see the solution →Give the name of the ore that is a major source of iron.
Question 15
3 marks · Easy
Answer and see the solution →(a)[1 mark]State one economic reason why the extraction of iron using carbon is preferred over electrolysis.
(b)[1 mark]Write the balanced chemical equation for the reduction of iron(III) oxide with carbon.
(c)[1 mark]Identify which substance is reduced in this reaction.
Question 16
2 marks · Easy
Answer and see the solution →Given the equation: \ce{Fe2O3(s) + 3CO(g) -> 2Fe(l) + 3CO2(g)}. Calculate the mass of iron produced when 32.0 g of Fe2O3 reacts completely. (Relative atomic masses: Fe = 56, O = 16)
Question 17
1 mark · Easy
Answer and see the solution →State why magnesium cannot be extracted from its oxide by reduction with carbon.
Question 18
3 marks · Easy
Answer and see the solution →The extraction of aluminium involves the use of an electrolytic cell.
(a)[1 mark]Name the substance in which aluminium oxide is dissolved for electrolysis.
(b)[2 marks]State the electrode at which aluminium metal is formed and write a half-equation for the reaction occurring there.
Question 19
2 marks · Easy
Answer and see the solution →A factory uses 18,000 kWh of electricity to extract 1 tonne of aluminium by electrolysis, while producing 1 tonne of iron by reduction with carbon uses 800 kWh. Calculate how many times more electricity is used to produce 1 tonne of aluminium than 1 tonne of iron. Give your answer to the nearest whole number.
Question 20
2 marks · Easy
Answer and see the solution →Manganese (a metal) can be extracted from its oxide, MnO2, by heating with aluminium powder. Explain why manganese can be extracted this way, and what this shows about its position in the reactivity series.