Which of the following describes the correct chemical test and positive result for chlorine gas?
Put a glowing splint into the gas; the splint relights
Put damp blue litmus paper into the gas; the paper turns red and then bleaches white
Bubble the gas through limewater; the limewater turns cloudy
Put a burning splint into the gas; it burns with a squeaky pop
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.