Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
The Halogens
86 practice questions
Topics covered
Practice questions
11–20 of 36 · Easy
Question 11
2 marks · Easy
Answer and see the solution →A student adds excess bromine water to 0.050 mol of potassium iodide solution. Calculate the maximum amount (in mol) of iodine that can be formed.
Question 12
2 marks · Easy
Answer and see the solution →Explain, using the reactivity trend, why chlorine can displace iodine from potassium iodide solution but iodine cannot displace chlorine from potassium chloride solution.
Question 13
3 marks · Easy
Answer and see the solution →A student added samples of chlorine, bromine and iodine solutions to three separate solutions of potassium chloride, potassium bromide and potassium iodide. The table shows her results:
Colour change observations for halogen displacement reactions Halogen solution added Potassium chloride Potassium bromide Potassium iodide Chlorine - orange brown Bromine - - brown Iodine - - - (a)[1 mark]Which solution gave a brown colour when iodine was present? Name the halogen displaced.
(b)[2 marks]Which is the most reactive halogen in this experiment? Explain your answer.
Question 14
1 mark · Easy
Answer and see the solution →Complete the word equation for the reaction: potassium iodide + chlorine → ___ + ___
Question 15
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the most reactive halogen out of chlorine, bromine, and iodine.
(b)[1 mark]Describe what happens when iodine solution is added to potassium bromide solution.
(c)[1 mark]Explain your answer to part (b).
Question 16
2 marks · Easy
Answer and see the solution →The following reaction occurs: 2KBr(aq) + Cl2(aq) -> 2KCl(aq) + Br2(aq) If 0.10 mol of chlorine reacts with excess potassium bromide, calculate the maximum amount in mol of bromine formed.
Question 17
1 mark · Easy
Answer and see the solution →Name the ion that is displaced when bromine water is added to sodium iodide solution.
Question 18
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 19
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 20
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.