Exam code: 5070
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9.2 Uses of Metals
Copper is sometimes used to make cooking utensils and pans.
Three properties of copper are shown below:
1 | Good conductor of electricity. |
2 | Corrosion resistant. |
3 | Good conductor of heat. |
Which of these properties make it good for making cooking utensils?
1 and 3
1 only
2 and 3
2 only
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Which substance is used to make food containers because it is resistant to corrosion?
carbon
iron
aluminium
zinc
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Copper is used for electrical wiring.
Which pair of properties makes copper suitable for this use?
good electrical conductivity and low density
good electrical conductivity and ductility
resistance to corrosion and low density
poor electrical conductivity and malleability
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Which row correctly matches a use of a metal to the property that makes the metal suitable for that use?
use | property | |
|---|---|---|
A | electrical wiring | low density |
B | food containers | good electrical conductivity |
C | overhead electrical cables | brittleness |
D | manufacture of aircraft | low density |
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Aluminium is used to make overhead electrical cables.
Which pair of properties makes aluminium suitable for this use?
low density and brittleness
high density and good electrical conductivity
low density and good electrical conductivity
good electrical conductivity and poor ductility
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The table shows some properties of four metals
Which of the four metals would be the most suitable for aircraft construction?
| density | strength | resistance to corrosion |
A | high | low | low |
B | low | high | high |
C | high | high | low |
D | low | low | high |
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Three statements about metals and their uses are shown below.
1 | Copper is used for electrical wiring because it is ductile. |
2 | Aluminium is used for overhead electrical cables because it has a high density. |
3 | Aluminium is used for food containers because it is resistant to corrosion. |
Which statements are correct?
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
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The table shows the density and the electrical conductivity of four metals.
metal | density in g/cm3 | electrical conductivity |
|---|---|---|
W | 8.9 | good |
X | 2.7 | good |
Y | 2.7 | poor |
Z | 11.3 | poor |
Which metal is the most suitable for making overhead electrical cables?
W
X
Y
Z
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Aluminium is used in the manufacture of aircraft and in the manufacture of overhead electrical cables.
Which property of aluminium is needed for both of these uses?
good electrical conductivity
a high melting point
good thermal conductivity
low density
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The wiring inside a house is made from copper rather than from aluminium.
Which property of copper best explains this choice?
It has a lower density than aluminium.
It is brittle.
It conducts electricity better than aluminium.
It conducts heat less well than aluminium.
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Three statements about metals and their uses are shown below.
1 | Aluminium is used for overhead electrical cables because of its low density. |
2 | Copper is used for electrical wiring because of its ductility. |
3 | Aluminium is used for food containers because it is a good conductor of electricity. |
Which statements are correct?
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
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The three statements below about aluminium are all correct.
Aluminium reacts readily to form aluminium oxide.
Aluminium is extracted from its ore by electrolysis as it cannot be extracted by reduction with carbon.
Aluminium is used in electrical cables because of its good electrical conductivity.
In which of these statements can 'aluminium' be replaced by 'copper' and still be correct?
1 | 2 | 3 | |
A | ✓ | ✓ | ✓ |
B | ✗ | ✓ | ✗ |
C | ✓ | ✗ | ✓ |
D | ✗ | ✗ | ✓ |
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Aluminium has all four of the properties listed below.
Which one of these properties is the main reason why aluminium is used to make food containers?
It has a low density.
It conducts heat well.
It resists corrosion.
It conducts electricity well.
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The table shows the density and the electrical conductivity of four metals.
metal | density in g/cm3 | electrical conductivity |
|---|---|---|
P | 8.9 | good |
Q | 2.7 | good |
R | 11.3 | poor |
S | 2.7 | poor |
Which metal is suitable for the manufacture of aircraft but not for overhead electrical cables?
P
Q
R
S
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Copper is a better conductor of electricity than aluminium.
Overhead electrical cables are made from aluminium.
Which statement explains this choice?
Aluminium has a lower density than copper, so the cables are lighter.
Aluminium conducts electricity better than copper.
Aluminium is a stronger metal than copper.
Aluminium has a higher melting point than copper.
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