A laboratory has samples A, B and C, containing potassium chloride, potassium bromide and potassium iodide, with one salt in each sample. The technician tests each sample with chlorine solution and bromine solution. The results are shown in the table.
| Sample | Chlorine solution | Bromine solution |
|---|---|---|
| A | reaction | reaction |
| B | no reaction | no reaction |
| C | reaction | no reaction |
Identify the sample containing potassium bromide.
Sample A contains potassium bromide.
Sample C contains potassium bromide.
Sample B contains potassium bromide.
The results do not identify the potassium bromide sample.
113 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.