A student tests solutions from four bottles. Each bottle contains one compound.
| Bottle | Add sodium hydroxide solution | Add dilute nitric acid, then silver nitrate solution |
|---|---|---|
| 1 | White precipitate | Yellow precipitate |
| 2 | No precipitate | White precipitate |
| 3 | Orange-brown precipitate | No precipitate |
| 4 | Green precipitate | Cream precipitate |
Statement 1: Bottle 1 could contain zinc iodide.
Statement 2: Bottle 2 could contain potassium chloride.
Statement 3: Bottle 3 could contain iron(III) chloride.
Statement 4: Bottle 4 could contain iron(III) bromide.
Which statements are correct?
1 and 2 only
1, 2 and 3 only
2 and 4 only
1, 3 and 4 only
107 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.