11 mark
Some metals are unreactive and exist on their own in the earth.
What are these metals known as?
Transition Metals
Native metals
Alkali Metals
Alkaline earth metals
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Extraction of Metals (Cambridge (CIE) IGCSE Chemistry)
Exam Questions
4 hours39 questions21 mark
Many metals can be extracted from their ores by heating the metal oxide with carbon.
Which of these metals can’t be extracted using carbon?
Zinc
Copper
Aluminium
Iron
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31 mark
The blast furnace is used to extract iron from haematite.
The haematite contains silica as an impurity
What is used to react with the impurity and remove it?
Carbon
Calcium oxide
Carbon dioxide
Oxygen
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41 mark
Iron is extracted from hematite, Fe2O3, in a blast furnace. Limestone is also added to the furnace.
What is the purpose of the limestone?
To remove impurities from the iron ore
To heat up the blast furnace
To reduce the hematite
To neutralise acidic gases
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51 mark
Which of the following metals can not be extracted from its ore by reduction?
Iron
Zinc
Copper
Lithium
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11 mark
In a blast furnace, iron (III) oxide is converted into iron and carbon monoxide is converted into carbon dioxide, as shown in the equation:
Fe2O3 + 3CO → 2 Fe + 3 CO2
What happens to each of these reactants?
Iron (III) oxide is reduced and carbon monoxide is oxidised.
Iron (III) oxide is oxidised and carbon monoxide is reduced.
Both iron (III) oxide and carbon monoxide are oxidised.
Both iron (III) oxide and carbon monoxide are reduced.
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21 mark
The diagram shows how aluminium is manufactured by electrolysis.
What are the anode and cathode made of?
| anode | cathode |
A | aluminium | aluminium |
B | aluminium | graphite |
C | graphite | aluminium |
D | graphite | graphite |
Option A
Option B
Option C
Option D
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31 mark
Aluminium is extracted from its oxide by electrolysis.
The oxide is dissolved in ……1…… cryolite and aluminium is deposited at the ……2……
Which words correctly complete gaps 1 and 2?
| 1 | 2 |
A | aqueous | cathode |
B | aqueous | anode |
C | molten | cathode |
D | molten | anode |
Option A
Option B
Option C
Option D
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41 mark
What are the products at each electrode in the extraction of aluminium?
| cathode | anode |
A | oxygen | aluminium |
B | chlorine | aluminium |
C | aluminium | chlorine |
D | aluminium | oxygen |
Option A
Option B
Option C
Option D
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51 mark
Which statement about the extraction of iron from its ore is not correct?
Iron can be extracted by reduction with carbon
Iron is easier to extract than zinc
Iron is easier to extract than copper
Iron is extracted from the ore, hematite
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11 mark
The three statements about aluminium are all correct.
1 | Aluminium has an oxide ore. |
2 | Aluminium is extracted from its ore by electrolysis. |
3 | Aluminium is used to make cooking utensils. |
Which of the statements would still be correct if aluminium was replaced with iron?
| 1 | 2 | 3 |
A |
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B |
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21 mark
Tin is less reactive than iron and the metal is extracted from its ore cassiterite, SnO2.
Which of the following statements are correct?
Tin does not conduct electricity.
Tin is hard and shiny
Tn can be extracted from cassiterite using carbon.
1, 2 & 3
1 & 2 only
1 & 3 only
2 & 3 only
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31 mark
Aluminium can be manufactured using electrolysis.
The diagram below shows the electrolysis cell.
Which of these statements is not correct about electrolysis of aluminium?
The cathode has to be replaced regularly as it is burnt away.
Aluminium gains electrons during electrolysis and is reduced.
The anode and cathode are made of graphite.
Cryolite is added to reduce the melting point of the aluminium oxide.
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41 mark
Which reaction does not occur in the extraction of aluminium?
Al3+ + 3 e– → Al
2 Al2O3 + 3 C → 4 Al + 3 CO2
2 O2– → O2 + 4 e–
C + O2 → CO2
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51 mark
Iron is produced in a blast furnace.
This process involves blowing oxygen into impure molten iron and adding calcium oxide.
What are the reasons for blowing in oxygen and adding calcium oxide?
| blowing in oxygen | adding calcium oxide |
A | reacts with carbon so removes it | removes basic impurities making slag |
B | oxygen reacts with iron | reacts with slag and so removes it |
C | oxygen reacts with iron | removes acidic impurities making slag |
D | reacts with carbon so removes it | removes acidic impurities making slag |
Option A
Option B
Option C
Option D
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