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
61–70 of 128
Question 61
1 mark · Easy
Answer and see the solution →Define the term 'alloy.'
Question 62
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 63
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.
Question 64
2 marks · Easy
Answer and see the solution →A pure metal rod can be bent easily because its layers of atoms can slide. In an alloy rod, a force of 200 N is needed to cause bending, but in the pure metal it requires only 120 N. Calculate how many times harder the alloy rod is to bend compared to the pure metal (give your answer to 1 decimal place).
Question 65
2 marks · Normal
Answer and see the solution →State two reasons why aluminium is widely used for making aircraft bodies.
Question 66
4 marks · Normal
Answer and see the solution →The diagrams below show simplified structures of a pure metal and an alloy. Study them and answer the questions.
(a)[1 mark]Define the term 'alloy.'
(b)[3 marks]Explain why alloys are usually harder than pure metals. You may use diagrams in your answer.
Question 67
3 marks · Normal
Answer and see the solution →Brass is an alloy of copper and zinc, and is often used for making musical instruments.
Explain, in terms of its structure, why brass is harder than pure copper. Your answer should refer to the arrangement of atoms.
Question 68
4 marks · Normal
Answer and see the solution →The table shows the melting point and main use of some metals.
Properties and uses of metals Metal Melting point (°C) Main use Aluminium 660 Overhead electricity cables Copper 1085 Electrical wiring Iron 1538 Building structures (a)[2 marks]Which metal from the table is most suitable for overhead power cables? Give one reason for your choice.
(b)[2 marks]Explain why copper is commonly used for making electrical wiring.
Question 69
1 mark · Normal
Answer and check →Why are alloys harder than pure metals?
- A.Alloys contain atoms of different sizes, which disrupt the layers.
- B.Alloys have fewer atoms.
- C.Alloys are always magnetic.
- D.Alloys have higher melting points.
Question 70
2 marks · Normal
Answer and see the solution →Give two reasons why copper is used for making electrical wiring.