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
71–80 of 136 · Hard
Question 71
2 marks · Hard
Answer and see the solution →State the extraction method used for aluminium and explain why this method is required, based on its position in the reactivity series.
Question 72
5 marks · Hard
Answer and see the solution →Magnesium and iron are both extracted from their ores, but by different methods.
(a)[1 mark]State the method used to extract iron from its ore.
(b)[3 marks]Explain, using the reactivity series, why this method can be used for iron but not for magnesium.
(c)[1 mark]Name the method used to extract magnesium from its ore.
Question 73
2 marks · Hard
Answer and see the solution →Explain why copper can sometimes be found as the uncombined element in the Earth's crust, but sodium cannot.
Question 74
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 75
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 76
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 77
5 marks · Hard
Answer and see the solution →(a)[1 mark]State the position of aluminium and carbon in the reactivity series.
(b)[2 marks]Describe what happens when carbon is heated with aluminium oxide.
(c)[2 marks]Explain, in terms of the reactivity series, why aluminium cannot be extracted from aluminium oxide by heating with carbon.
Question 78
2 marks · Hard
Answer and see the solution →State the substance in which aluminium oxide is dissolved for electrolysis, and explain why this substance is used.
Question 79
2 marks · Hard
Answer and see the solution →Chromium can be extracted from chromium(III) oxide by heating it with aluminium powder. Describe how this reaction shows the use of a more reactive metal in extraction, and explain why aluminium is used instead of carbon.
Question 80
2 marks · Hard
Answer and see the solution →Copper is often used in building water pipes. Give two physical properties of copper, apart from electrical conductivity, that make it suitable for this use.