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
11–20 of 57 · Normal
Question 11
3 marks · Normal
Answer and see the solution →A sample of iron(III) oxide, Fe2O3, weighing 8.0 g is to be reduced by carbon monoxide according to the balanced equation:
Calculate the maximum mass of iron that can be obtained from the sample. (Relative atomic masses: Fe = 56, O = 16)
Question 12
3 marks · Normal
Answer and see the solution →Explain why metals below carbon in the reactivity series, such as zinc and iron, are extracted by reduction with carbon, but metals above carbon are not.
Question 13
4 marks · Normal
Answer and see the solution →The table shows some metals and their relative position in the reactivity series.
Part of the reactivity series Metal Position (1 = most reactive) Potassium 1 Zinc 6 Iron 7 Copper 10 (a)[2 marks]Identify which of these metals can be extracted from its oxide using carbon.
(b)[2 marks]Give a reason for your answer.
Question 14
1 mark · Normal
Answer and check →Which of the following correctly describes the extraction of iron from iron(III) oxide in a blast furnace?
- A.Iron(III) oxide is reduced by carbon monoxide.
- B.Iron(III) oxide is reduced by hydrogen.
- C.Iron(III) oxide is electrolysed to form iron.
- D.Iron(III) oxide is oxidised by carbon.
Question 15
2 marks · Normal
Answer and see the solution →Explain, using the concept of reduction, what happens to iron ions during extraction from iron(III) oxide.
Question 16
4 marks · Normal
Answer and see the solution →(a)[2 marks]Describe one economic advantage of extracting iron by heating with carbon rather than by electrolysis.
(b)[2 marks]The chemical equation for extracting iron using carbon is:
In this reaction, state which substance is oxidised and which is reduced.
Question 17
2 marks · Normal
Answer and see the solution →State why metals above carbon in the reactivity series cannot be extracted from their oxides by reduction with carbon.
Question 18
4 marks · Normal
Answer and see the solution →Aluminium is extracted from aluminium oxide using electrolysis.
(a)[1 mark]Name the substance in which aluminium oxide is dissolved for the electrolysis process.
(b)[1 mark]Write the ionic equation for the reaction at the cathode during the electrolysis of aluminium oxide.
(c)[1 mark]Write the ionic equation for the reaction at the anode during this process.
(d)[1 mark]Explain why the extraction of aluminium by electrolysis is much more expensive than extracting iron by reduction with carbon.
Question 19
3 marks · Normal
Answer and see the solution →Titanium cannot be extracted from its oxide using carbon. It is often extracted by heating titanium oxide with sodium or magnesium.
Explain why this method is expensive and give a reason why this process is used instead of reduction with carbon.
Question 20
4 marks · Normal
Answer and see the solution →The table shows some metals and whether they can be extracted from their oxides by using carbon.
(a)[0 marks]Extraction of Metals by Carbon Metal Extracted using carbon (Yes/No) Potassium No Iron Yes Aluminium No Copper Yes (b)[1 mark]Identify two metals from the table that cannot be extracted using carbon.
(c)[1 mark]Explain why potassium cannot be extracted by reduction with carbon.
(d)[1 mark]State the method used to extract aluminium from its ore.
(e)[1 mark]Describe why copper can be extracted by using carbon.