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State the name of the ore of iron that is used in the blast furnace.
See it on the paper →the main element in steel
See it on the paper →Which statement about manufacturing processes is correct?
See it on the paper →State the name of an ore that contains iron. Choose from the list. bauxite hematite malachite marble
See it on the paper →Three raw materials are added to the top of the blast furnace. These are iron ore, limestone and substance A. State the name of substance A.
See it on the paper →Inside the blast furnace, iron ore, Fe 2 O 3 , reacts with carbon monoxide, CO. Iron, Fe, and carbon dioxide, CO 2 , are made. Write the balanced symbol equation for this reaction.
See it on the paper →State the substance that reacts with oxygen in the blast furnace.
See it on the paper →Identify the reducing agent that is formed in the blast furnace.
See it on the paper →Common incorrect answers included bauxite or iron ore with few correct answers seen.
— Examiner report, May/June 2025, 0654/31 Q7(a)(ii) (Cambridge)
Hematite was often correctly chosen as an iron ore, with bauxite being a popular incorrect choice.
— Examiner report, May/June 2021, 0654/43 Q5(b)(i) (Cambridge)
Forms of carbon were correctly suggested by some as being a raw material for the blast furnace, other choices including biproducts of the process and materials from the list in part (i).
— Examiner report, May/June 2021, 0654/43 Q5(b)(ii) (Cambridge)
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Iron(III) oxide consists of iron ions, Fe 3+ , and oxide ions, O 2– . Use ideas about atoms, ions and electron transfer to explain how iron (III) oxide is reduced to iron.
Complete the sentences, using words from the list below, to describe how acidic impurities are removed in the blast furnace. Each word or phrase may be used once, more than once or not at all. air calcium carbonate carbon dioxide iron calcium oxide carbon silicon dioxide slag Calcium carbonate decomposes to and at the...
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