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
271–280 of 869
Question 271
4 marks · Normal
Answer and see the solution →Answer the following about redox reactions and agents.
(a)[1 mark]State what is meant by oxidation.
(b)[1 mark]State what is meant by reduction.
(c)[1 mark]Explain what an oxidising agent does in a reaction.
(d)[1 mark]Give the definition of a reducing agent.
Question 272
3 marks · Normal
Answer and see the solution →Iron(III) oxide can be reduced by aluminium in a displacement reaction:
Calculate the maximum mass of iron produced if 8.0 g of iron(III) oxide is reduced completely using this reaction. (Relative atomic masses: Fe = 56, Al = 27, O = 16)
Question 273
3 marks · Normal
Answer and see the solution →A student claims that aluminium can displace zinc from zinc oxide, but not iron from iron(III) oxide. Explain, based on the reactivity series, whether the student's claim is correct.
Question 274
4 marks · Normal
Answer and see the solution →The table shows the results when three metals are mixed with the oxides of the others and heated.
Mixture Reaction observed? Metal X + oxide of Y Yes Metal Y + oxide of Z No Metal Z + oxide of X No Metal Y + oxide of X No Metal Z + oxide of Y Yes (a)[2 marks]Which metal is the most reactive? Explain your reasoning.
(b)[2 marks]Which metal is the least reactive? Explain your answer.
Question 275
2 marks · Hard
Answer and see the solution →Copper(II) oxide reacts with a solid element X when heated, producing copper metal and a white solid. Element X cannot displace magnesium from magnesium oxide.
Question 276
5 marks · Hard
Answer and see the solution →A student heats powdered samples of four different metals (A, B, C, D) separately with iron(III) oxide. The results are shown:
Observations of reactions with iron(III) oxide Metal Observation with iron(III) oxide A A bright reaction. Grey metal formed. B No visible change. C Slow reaction with faint glow. Grey metal appeared. D No reaction even after strong heating. (a)[2 marks]Arrange the four metals (A, B, C, D) in order of their reactivity, from most reactive to least reactive, based on the observations above.
(b)[3 marks]Suggest what happens chemically when metal A reacts with iron(III) oxide. State which metal is reduced and which is oxidised.
Question 277
2 marks · Hard
Answer and see the solution →State what is meant by the term 'reducing agent' in a redox reaction, and give an example from a reaction involving metal oxides.
Question 278
1 mark · Easy
Answer and see the solution →In the equation below, which species is oxidised? State your answer as the formula.
Question 279
3 marks · Easy
Answer and see the solution →Complete the following sentences about oxidation and reduction in terms of oxygen transfer.
(a)[1 mark]A substance is oxidised if it ___ oxygen.
(b)[1 mark]A substance is reduced if it ___ oxygen.
(c)[1 mark]In the reaction: , name the substance that is reduced.
Question 280
2 marks · Easy
Answer and see the solution →The equation below represents a reaction: \[ 2Ag_2O \rightarrow 4Ag + O_2 \] State the oxidising agent and the reducing agent in this reaction.
(a)[1 mark]Identify the oxidising agent.
(b)[1 mark]Identify the reducing agent.