Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Reactions of the halogens
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →State the physical state and the colour of bromine at room temperature. Give one property of halogens that is the same for chlorine, bromine, and iodine.
Question 2
5 marks · Hard
Answer and see the solution →This question is about the reactivity of halogens and their displacement reactions.
(a)[1 mark]Write a balanced chemical equation for the reaction between bromine and potassium iodide solution.
(b)[2 marks]Explain why a reaction occurs between bromine and potassium iodide solution. Refer to the reactivity of the halogens in your answer.
(c)[1 mark]Describe what you would see during this reaction.
(d)[1 mark]Name the solution you would use to confirm the presence of iodine formed in this reaction. State the colour observed.
Question 3
2 marks · Hard
Answer and see the solution →A science teacher has three sealed containers, each holding one of the following halogens at room temperature (25°C):
(a)[1 mark]One container holds a halogen which is a red-brown liquid at room temperature. Name this halogen and state its physical state at room temperature.
(b)[1 mark]Another container holds a halogen that is a grey-black solid at room temperature. Name this halogen and state its colour at room temperature.