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
171–180 of 359 · Easy
Question 171
5 marks · Easy
Answer and see the solution →(a)[1 mark]The reactivity series below shows the order of metals from most to least reactive. Potassium, Sodium, Lithium, Calcium, Magnesium, Zinc, Iron, Copper.
Arrange the following three metals in order of reactivity, from most reactive to least reactive: magnesium, copper, iron.
(b)[1 mark]Iron(III) oxide reacts with aluminium powder when heated.
Write a word equation for this reaction.
(c)[2 marks]Explain which substance is oxidised and which substance is reduced in this reaction, in terms of oxygen transfer.
(d)[1 mark]In the reaction above, which metal is displaced from its oxide?
Question 172
5 marks · Easy
Answer and see the solution →(a)[1 mark]State what is meant by a displacement reaction involving a metal oxide.
(b)[2 marks]When carbon is heated with iron(III) oxide, the following reaction occurs:
Identify which substance is reduced in this reaction and explain your answer in terms of oxygen transfer.
(c)[1 mark]Name one use of carbon as a reducing agent in industry.
(d)[1 mark]Explain why carbon cannot be used to extract magnesium from magnesium oxide.
Question 173
5 marks · Easy
Answer and see the solution →A student heats a mixture of powdered aluminium and iron(III) oxide. The following reaction occurs:
(a)[2 marks]Use the reactivity series to explain why this reaction occurs. Identify which metal is displaced and why.
(b)[3 marks]In terms of electron transfer, describe what happens to aluminium and what happens to iron(III) oxide in the reaction above. Use your answer to part (a) to help you.
Question 174
1 mark · Easy
Answer and see the solution →State one method used to extract iron from its ore.
Question 175
3 marks · Easy
Answer and see the solution →The table gives the order of some metals in the reactivity series and their methods of extraction.
(a)[1 mark]State why gold can be found as a pure metal in the Earth's crust.
(b)[1 mark]Name the method used to extract aluminium from its ore.
(c)[1 mark]Explain why aluminium requires this method.
Question 176
2 marks · Easy
Answer and see the solution →Copper(II) oxide can be reduced by carbon to extract copper metal.
In an experiment, 8.0 g of copper(II) oxide is heated with carbon and produces 6.4 g of copper.
Calculate the mass of oxygen removed from the copper(II) oxide.
Question 177
2 marks · Easy
Answer and see the solution →Explain, using the reactivity series, why silver is sometimes found as a metal in the Earth's crust, but zinc must be extracted from its ore.
Question 178
3 marks · Easy
Answer and see the solution →The table shows three metals, their reactivity, and their extraction methods.
Extraction of metals Metal Position in Reactivity Series Extraction Method Potassium Very reactive ? Zinc Less reactive than carbon Reduction with carbon Silver Least reactive Found native (a)[1 mark]Suggest the method used to extract potassium from its ore.
(b)[1 mark]State the type of compound potassium is usually found in.
(c)[1 mark]Explain why silver can be found as the native metal but zinc cannot.
Question 179
1 mark · Easy
Answer and see the solution →Name one metal that can be found native (as an uncombined element) in the Earth's crust.
Question 180
3 marks · Easy
Answer and see the solution →Lead is less reactive than aluminium but more reactive than silver.
(a)[1 mark]Name one method used to extract lead from its ore.
(b)[2 marks]Would you expect to find lead in the Earth's crust as the metal or as a compound? Give a reason for your answer.