Chlorine water is added to potassium bromide solution. What happens?
Bromine is formed and the solution turns orange
No reaction, because chlorine is less reactive
Iodine is formed and the solution turns brown
Bromine is formed and the solution stays colourless
106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.