A student adds separate samples of various Period 3 oxides to water at 298 K until no further reaction or dissolution occurs.
Which row correctly identifies the oxide, the typical pH of the resulting mixture, and the colour of the solution after adding Universal Indicator?
| Oxide | pH | Universal indicator colour | |
|---|---|---|---|
| A | Na2ONa_2ONa2O | 13 | yellow |
| B | P4O10P_4O_{10}P4O10 | 1 | purple |
| C | SO3SO_3SO3 | 1 | red |
| D | MgOMgOMgO | 9 | red |
Row A
Row B
Row C
Row D
55 exam-style questions on OCR GCSE Chemistry Types of chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.