11 mark
Which diagram shows an alloy?
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Properties, Uses & Alloys of Metals (CIE IGCSE Chemistry: Co-ordinated Sciences (Double Award))
Exam Questions
3 hours32 questions21 mark
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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31 mark
Most of the elements on the Periodic Table are metals. Metals can be distinguished from non-metals by differences in their physical properties.
Which row correctly describes a metal?
| Malleability | Heat & electrical conductivity | |
| A | format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22math13b8a614226a953a8cd9526fca6%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%228.5%22%20y%3D%2216%22%3E%26%23xD7%3B%3C%2Ftext%3E%3C%2Fsvg%3E) |
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| B | |
|
| C | |
|
| D | |
|
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41 mark
Extended tier only
Zinc has many uses in the home. The diagram shows two items that contain zinc.
In which of these items is zinc used as an alloy?
| bucket | door-knocker | |
| A | |
|
| B | |
|
| C | |
|
| D | |
|
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51 mark
Extended tier only
Why are alloys harder than the pure metals from which they are made?
| A | There are stronger bonds between the atoms |
| B | The atoms are all the same size |
| C | The layers of atoms are distorted |
| D | The properties of each element have combined |
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11 mark
A sample of element Y is shiny and can be shaped by hammering.
Which row of the table corresponds to the properties of element Y?
| conducts electricity | melts below 25℃ | |
| A | |
|
| B | |
|
| C | |
|
| D | |
|
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21 mark
Some of the properties of four different elements Q, P, R and S are listed below:
| 1 | Q melts at 1410 °C and forms an acidic oxide. |
| 2 | P has a high density and is easily drawn into wires. |
| 3 | R acts as a catalyst and its oxide reacts with acids |
| 4 | S is a red-brown solid used to make alloys. |
Which of the elements are metals?
1 and 3 only
2 and 4 only
2, 3 and 4
1,2 and 3
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31 mark
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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41 mark
Brass is an alloy of two metals.
Which row describes the correct use of the two metals that brass is made from?
| metal 1 | metal 2 | |
| A | galvanising steel | making aircraft |
| B | electrical wiring | galvanising steel |
| C | making aircraft | making cutlery |
| D | making cooking pans | electrical wiring |
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51 mark
Extended tier only
The structure of an alloy is shown below. Alloys are mixtures of metals with other metals or non-metals.
They are usually much stronger and harder than pure metals. Which statement explains these features?
The irregular sizes of the atoms distorts the regular arrangement in the metal structure, meaning more force is required to bend the metal
The irregular sizes of the atoms distorts the regular arrangement in the metal structure as the bonding is disrupted when the atoms are added
The regular sizes of the atoms distorts the irregular arrangement in the metal structure, meaning more force is required to bend the metal
A mixture of metals is tougher than a pure metal because a mixture has more intermolecular forces than a pure metal.
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11 mark
Properties of four elements are shown below.
Which of these elements is a metal?
| electrical conductivity when solid | electrical conductivity when liquid | melting point ℃ | |
| A | low | low | -7 |
| B | high | low | 801 |
| C | high | high | 1535 |
| D | low | low | 3550 |
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21 mark
Brass is an alloy of two metals
.
Which is the correct statement?
The alloy will completely dissolve in dilute hydrochloric acid.
Brass is formed by a chemical reaction between two metals
Brass can be represented by a chemical formula
One of the metals in the alloy will dissolve in dilute hydrochloric acid
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31 mark
Element Y is malleable and ductile.
Which correctly describes the properties of element Y?
| Electrical conductivity (solid) | Electrical conductivity (molten) | Melting Point / oC | |
| 1 | ✓ | ✓ | 2861 |
| 2 | ✓ | ✓ | 63 |
| 3 | ✗ | ✓ | 801 |
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
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41 mark
The three statements below about aluminium are all correct.
| 1 | Aluminium reacts readily to form aluminium oxide |
| 2 | Aluminium is extracted from its ore by electrolysis as it cannot be extracted by reduction with carbon |
| 3 | Aluminium is used in electrical wiring 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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51 mark
Some properties of elements K, L, M and N are given.
| 1 | K acts as a catalyst and its oxide reacts with hydrochloric acid |
| 2 | L is a dull dark grey solid that conducts electricity and has a melting point of 3600 oC |
| 3 | M is easily hammered into shape and has a high density |
| 4 | N has a melting point of 113 oC and forms an acidic oxide |
Which of the elements are metals?
1 and 3 only
2, 3 and 4
2 and 3 only
2 and 4 only
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