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
71–80 of 128
Question 71
4 marks · Normal
Answer and see the solution →The diagrams show a pure metal and an alloy. Use your knowledge of structure and properties to answer the questions.
(a)[1 mark]Describe the arrangement of atoms in a pure metal.
(b)[3 marks]Explain why the alloy is harder than the pure metal.
Question 72
3 marks · Normal
Answer and see the solution →Aluminium is often used to make power transmission cables because it has a low density and is a good conductor of electricity. A section of cable is made of pure aluminium and has a mass of and a volume of .
Calculate the density of aluminium in . State one reason, based on its properties, why aluminium is chosen for this use.
Density = mass ÷ volume
(a)[2 marks]Calculate the density of aluminium in .
(b)[1 mark]State one property of aluminium that makes it suitable for use in power cables.
Question 73
2 marks · Hard
Answer and see the solution →Copper is often used in building water pipes. Give two physical properties of copper, apart from electrical conductivity, that make it suitable for this use.
Question 74
5 marks · Hard
Answer and see the solution →A coin is made from an alloy containing copper and nickel.
(a)[1 mark]Define the term 'alloy'.
(b)[3 marks]Explain, in terms of atomic structure, why this alloy is harder than either pure copper or pure nickel.
(c)[1 mark]Suggest one advantage of using the alloy instead of pure copper for making coins.
Question 75
2 marks · Hard
Answer and see the solution →Aluminium is often chosen for the bodies of aircraft. Explain two reasons, based on its physical properties, for this choice.
Question 76
1 mark · Easy
Answer and see the solution →State one property of aluminium that makes it suitable for making aeroplane bodies.
Question 77
3 marks · Easy
Answer and see the solution →Pure aluminium is not commonly used for building structures. The table below shows two metals and two alloys.
Material Type Aluminium Pure metal Steel Alloy Duralumin Alloy Copper Pure metal (a)[1 mark]State why pure aluminium is rarely used instead of its alloys.
(b)[2 marks]Explain how alloying aluminium changes its structure to make it stronger.
Question 78
2 marks · Easy
Answer and see the solution →A newly-made sheet of aluminium has a mass of 5.4 g. After some time, a 0.0004 g layer of aluminium oxide forms on the surface, preventing further corrosion. Calculate the total mass of the sheet after the oxide layer has formed. Give your answer to 3 decimal places.
Question 79
2 marks · Easy
Answer and see the solution →Explain why aluminium is often used for cooking pans. Refer to two properties of aluminium in your answer.
Question 80
3 marks · Easy
Answer and see the solution →The table shows the strength of pure aluminium and some aluminium alloys.
Material Relative Strength Pure aluminium Low Aluminium + magnesium High Aluminium + copper Very high (a)[1 mark]Which of the materials in the table would be least suitable for use in construction? Give a reason.
(b)[1 mark]State how alloying with copper affects the strength of aluminium.
(c)[1 mark]Explain why adding another metal to aluminium changes its strength.