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
21–30 of 50 · Easy
Question 21
1 mark · Easy
Answer and see the solution →State why copper, which is above carbon in the reactivity series, cannot be extracted from copper(II) oxide by heating with carbon.
Question 22
3 marks · Easy
Answer and see the solution →The diagram shows the extraction of aluminium from aluminium oxide.
Electrolysis cell for aluminium extraction Aluminium oxide is dissolved in molten cryolite and electrolysed.
(a)[1 mark]State the formula of aluminium oxide.
(b)[1 mark]Give the reason why cryolite is used in this process.
(c)[1 mark]Write the half-equation for the reaction at the cathode.
Question 23
2 marks · Easy
Answer and see the solution →A company is deciding whether to extract a metal by carbon reduction or electrolysis. It costs £70 to make 1 tonne of metal using carbon reduction and £780 to make 1 tonne of aluminium using electrolysis.
Calculate how much more expensive it is to produce aluminium by electrolysis rather than using carbon reduction.
Question 24
1 mark · Easy
Answer and see the solution →State one reason why aluminium resists corrosion.
Question 25
3 marks · Easy
Answer and see the solution →Brass is an alloy made from copper and zinc. Use your knowledge of alloys to answer the following:
(a)[1 mark]Define the term "alloy."
(b)[2 marks]Explain, in terms of structure, why brass is harder than pure copper.
Question 26
2 marks · Easy
Answer and see the solution →Explain why steel is an alloy and why it is harder than pure iron.
Question 27
3 marks · Easy
Answer and see the solution →The table shows properties of two metals.
Properties of metals Metal Density (g/cm³) Main Use Aluminium 2.7 Aircraft bodies Copper 8.9 Electrical wiring (a)[1 mark]Which metal in the table has the lower density?
(b)[1 mark]State the main use of copper shown in the table.
(c)[1 mark]Suggest why aluminium is used in aircraft bodies instead of copper.
Question 28
1 mark · Easy
Answer and see the solution →Define the term 'alloy.'
Question 29
3 marks · Easy
Answer and see the solution →Answer the following about metals:
(a)[2 marks]Name two physical properties of copper.
(b)[1 mark]State one use of iron or steel.
Question 30
2 marks · Easy
Answer and see the solution →A pan is made using aluminium because of its low density. The pan has a mass of 540 g and a volume of 200 cm³. Calculate the density of aluminium in g/cm³.