Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
451–460 of 869
Question 451
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 452
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 453
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 454
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 455
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 456
2 marks · Hard
Answer and see the solution →State what is meant by 'reduction' in the extraction of metals from metal oxides. Give your answer in terms of both oxygen and electrons.
Question 457
5 marks · Hard
Answer and see the solution →The table shows the position of three metals in the reactivity series:
Metal Position relative to carbon Lead Below carbon Aluminium Above carbon Zinc Below carbon A manufacturer wants to extract each metal from its oxide using the cheapest method.
(a)[2 marks]State which two of these metals can be extracted from their oxides by heating with carbon. Explain your answer using the reactivity series.
(b)[2 marks]Aluminium oxide is not extracted by heating with carbon. Explain why not, and name the method used instead.
(c)[1 mark]Write a balanced symbol equation for the extraction of zinc from zinc oxide using carbon.
Question 458
2 marks · Hard
Answer and see the solution →Explain why extraction of iron using carbon is more economical than extraction using electrolysis. Give two reasons.
Question 459
1 mark · Easy
Answer and see the solution →State why magnesium cannot be extracted from its oxide by reduction with carbon.
Question 460
3 marks · Easy
Answer and see the solution →The extraction of aluminium involves the use of an electrolytic cell.
(a)[1 mark]Name the substance in which aluminium oxide is dissolved for electrolysis.
(b)[2 marks]State the electrode at which aluminium metal is formed and write a half-equation for the reaction occurring there.