Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
The Halogens
86 practice questions
Topics covered
Practice questions
51–60 of 86
Question 51
1 mark · Normal
Answer and check →Which statement correctly explains why chlorine acts as an oxidising agent in its reaction with bromide ions?
- A.It loses electrons and is oxidised itself.
- B.It gives electrons to bromide ions.
- C.It gains electrons and is reduced.
- D.It forms a brown solution.
Question 52
2 marks · Normal
Answer and see the solution →Complete the ionic equation for the reaction between bromine and sodium iodide solution. Include state symbols.
Question 53
4 marks · Normal
Answer and see the solution →Two students discuss the reaction between chlorine and potassium iodide solution.
(a)[2 marks]Write the ionic equation for this reaction, including state symbols.
(b)[2 marks]Explain, using the meanings of oxidation and reduction, which substance is oxidised and which is reduced in this reaction.
Question 54
3 marks · Normal
Answer and see the solution →Chlorine gas is bubbled through a solution of sodium iodide. Write the balanced ionic equation for this reaction. Show, with working, the steps you use to remove spectator ions from the full ionic equation.
Question 55
2 marks · Hard
Answer and see the solution →Write the balanced ionic equation, including state symbols, for the reaction that occurs when chlorine gas is bubbled through a solution containing sodium bromide. Do not include spectator ions.
Question 56
5 marks · Hard
Answer and see the solution →Iodine solution is added to potassium chloride solution. No reaction is observed. Consider the redox processes involved in displacement reactions between halogens and halide ions.
(a)[2 marks]Explain, in terms of electron transfer, why iodine does not displace chloride ions from potassium chloride solution.
(b)[2 marks]A reaction does occur when bromine water is added to potassium iodide solution. State which species is oxidised and which is reduced in this reaction.
(c)[1 mark]Write the balanced ionic equation, including state symbols, for the reaction between bromine solution and iodide ions.
Question 57
2 marks · Hard
Answer and see the solution →Complete the ionic equation, including state symbols, for the reaction of fluorine gas with potassium bromide solution.
Question 58
1 mark · Easy
Answer and see the solution →State the colour you would expect for the vapour of bromine at room temperature based on group trends.
Question 59
3 marks · Easy
Answer and see the solution →This question is about why chlorine is more reactive than iodine.
(a)[1 mark]State the charge on the ion formed when a chlorine atom gains an electron.
(b)[2 marks]Describe, using electronic configuration, why a chlorine atom is better at gaining an electron than an iodine atom.
Question 60
2 marks · Easy
Answer and see the solution →Explain, in terms of electronic configuration, why bromine is less reactive than chlorine.