A student does some tests on a white solid, X.
| Test | Result |
|---|---|
| Flame test on solid X | Lilac flame |
| Dissolve X in water and add dilute nitric acid | No fizzing |
| Then add silver nitrate solution | No precipitate |
Which substance could be solid X?
Potassium carbonate
Potassium sulfate
Potassium chloride
Sodium sulfate
52 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.