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
121–130 of 869
Question 121
2 marks · Hard
Answer and see the solution →Potassium bromide solution is added to separate solutions of chlorine and iodine. Describe what you would observe in each case, and explain why these observations are different.
Question 122
5 marks · Hard
Answer and see the solution →A student adds solutions of bromine and iodine to separate samples of potassium chloride and potassium iodide. The results are summarised below:
Summary of Observed Colour Changes Added halogen solution Potassium chloride solution Potassium iodide solution Bromine No change Brown colour appears Iodine No change No change Use the information and your knowledge of halogen reactivity to answer the following.
(a)[1 mark]Write a balanced chemical equation for the reaction that occurs when bromine solution is added to potassium iodide solution.
(b)[2 marks]Explain why there is no reaction when bromine solution is added to potassium chloride solution.
(c)[2 marks]Describe and explain the difference in the observations when bromine and iodine solutions are added to potassium iodide solution.
Question 123
2 marks · Hard
Answer and see the solution →State and explain the trend in the reactivity of chlorine, bromine and iodine as shown by their displacement reactions.
Question 124
1 mark · Easy
Answer and see the solution →Name the ion that is displaced when bromine water is added to sodium iodide solution.
Question 125
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 126
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 127
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 128
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 129
1 mark · Easy
Answer and see the solution →State which species is reduced in the reaction between chlorine and potassium bromide.
Question 130
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.