The chemical processes in the production of steel from hematite ore involve :
Correct answer: D. oxidation followed by reduction
- A. reduction
- B. oxidation
- C. reduction followed by oxidation
- D. oxidation followed by reduction
Explanation
Option D is correct. The chemical processes in the production of steel from hematite ore involve oxidation followed by reduction. The first step in the process is to oxidize the iron ore to form iron oxide. This is done by heating the ore in the presence of oxygen. The reaction is given by the following equation: 2Fe2O3 + 3C → 4Fe + 3CO2 In this reaction, the iron oxide is oxidized to iron, while the carbon is reduced to carbon dioxide. The second step in the process is to reduce the iron oxide to iron. This is done by heating the iron oxide in the presence of carbon monoxide. The reaction is given by the following equation: Fe2O3 + 3CO → 2Fe + 3CO2 In this reaction, the iron oxide is reduced to iron, while the carbon monoxide is oxidized to carbon dioxide. The overall process of producing steel from hematite ore is a two-step process: Oxidation of the iron ore to form iron oxide. Reduction of the iron oxide to iron. The oxidation step is carried out in a blast furnace, while the reduction step is carried out in a steelmaking furnace.
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The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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