Which row shows the correct oxidation state and co-ordination number of chromium in [Cr(H2NCH2CH2NH2)2Cl2]Cl[\text{Cr}(\text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2)_2\text{Cl}_2]\text{Cl}[Cr(H2NCH2CH2NH2)2Cl2]Cl?
| Oxidation state | Co-ordination number | |
|---|---|---|
| A | +3 | 4 |
| B | +3 | 6 |
| C | +2 | 6 |
| D | +2 | 4 |
A
B
C
D
63 exam-style questions on AQA A Level Chemistry Transition metals (A-level only), covering General properties of transition metals (A-level only), Substitution reactions (A-level only), Shapes of complex ions (A-level only), Formation of coloured ions (A-level only), Variable oxidation states (A-level only), and Catalysts (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.