A student adds three halogen solutions, P, Q and R, to solutions of potassium halides.
The table shows the results.
| Halogen solution | Potassium chloride | Potassium bromide | Potassium iodide |
|---|---|---|---|
| P | no reaction | not tested | reaction |
| Q | no reaction | no reaction | not tested |
| R | not tested | reaction | reaction |
Which option identifies P, Q and R?
P is chlorine, Q is iodine, R is bromine
P is bromine, Q is iodine, R is chlorine
P is iodine, Q is bromine, R is chlorine
P is bromine, Q is chlorine, R is iodine
60 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.