During a laboratory investigation into the trends in reactivity of the Group 7 elements, a technician adds a small volume of pale-green chlorine water to an excess of colourless sodium bromide solution.
State the observation that would be made.
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.