Reaction X is used as a test for water. Reaction Y takes place in the blast furnace used to extract iron. Reaction X: $\text{CoCl}_2 + 6\text{H}_2\text{O} \rightleftharpoons \text{CoCl}_2\cdot 6\text{H}_2\text{O}$ Reaction Y: $\text{C} + \text{CO}_2 \rightarrow 2\text{CO}$ Reaction X is ......1...... . In reaction Y, the oxide $\text{CO}_2$ is ......2...... . Which words correctly fill gaps 1 and 2?
- Airreversible ; oxidised
- Birreversible ; reduced
- Creversible ; oxidised
- Dreversible ; reduced