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| Question | Answer |
| Finish the equation : iron oxide + carbon monoxide --> | carbon dioxide + iron |
| What is reduction? | Loss of oxygen |
| What is oxidation ? | Gain of oxygen |
| Balance the follwing equation: Fe2 O3 + CO --> Fe + CO2 | Fe2 O3 + 3CO --> 2Fe + 3CO2 --> |
| What is added to the top of the blast furnace? | Coke, limestone, iron oxide |
| What is limestone used for? | To remove impurities |
| Why do we need to add coke? | It provides fuel and a source of carbon. |
| What is the waste product of the blast furnace called? | slag |
| Why does carbon displace iron from iron oxide? | Carbon is more reactive than iron |
| What is the main use of iron ? | It is used to make steel. |
| What is an alloy? | An alloy is a mixture of metals or a mixture of metals and another element such as carbon. |
| Where does the iron come out of the blast furnace? | At the very bottom. |
| What is blown into the blast furnace at the sides? | Hot air |
| What comes out of the blast furnace at near the top? | Waste gases |
| What displaces iron from iron oxide? | Carbon |