Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Displacement reactions as redox reactions
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →Name the ion that is displaced when bromine water is added to sodium iodide solution.
Question 2
3 marks · Easy
Answer and see the solution →Fluorine can react with potassium chloride solution in a displacement reaction.
(a)[2 marks]State whether potassium chloride reacts with bromine water. Explain your answer.
(b)[1 mark]Explain why fluorine always acts as an oxidising agent in these types of reactions.
Question 3
2 marks · Easy
Answer and see the solution →Write the balanced ionic equation, including state symbols, for the displacement reaction when chlorine gas is bubbled through a solution of sodium fluoride.
Question 4
2 marks · Easy
Answer and see the solution →Explain, in terms of electron transfer, why bromine acts as an oxidising agent in its reaction with iodide ions.
Question 5
3 marks · Easy
Answer and see the solution →The table shows the results of adding halogen solutions to different potassium halide solutions.
Observations of displacement reactions Halogen solution Potassium chloride Potassium bromide Potassium iodide Chlorine water — orange solution brown solution Bromine water — — brown solution Iodine solution — — — (a)[2 marks]State two observations from the table that provide evidence for displacement reactions.
(b)[1 mark]Identify the halide ion displaced by chlorine water from the solutions tested.
Question 6
1 mark · Easy
Answer and see the solution →State which species is reduced in the reaction between chlorine and potassium bromide.
Question 7
3 marks · Easy
Answer and see the solution →Complete the ionic equation for the reaction between bromine water and sodium iodide solution. Include state symbols.
(a)[1 mark]Write the products formed in the reaction.
(b)[2 marks]Write a balanced ionic equation, including state symbols, for the reaction.
Question 8
2 marks · Easy
Answer and see the solution →Bromine water is added to a solution of sodium iodide. Explain, in terms of electron transfer, why bromine acts as an oxidising agent in this reaction.
Question 9
2 marks · Normal
Answer and see the solution →Write the ionic equation, with state symbols, for the displacement reaction between bromine water and potassium iodide solution.
Question 10
4 marks · Normal
Answer and see the solution →Chlorine water is added to a solution of potassium bromide.
(a)[1 mark]State what you would see when chlorine water is added to potassium bromide solution.
(b)[2 marks]Explain why this reaction is an example of a redox reaction. Refer to oxidation and reduction in your answer.
(c)[1 mark]Name the oxidising agent in this reaction.