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प्रश्न
The main reactions occurring in blast furnace during extraction of iron from haematite are:
(i) \[\ce{Fe2O3 + 3CO -> 2Fe + 3CO2}\]
(ii) \[\ce{FeO + SiO2 -> FeSiO3}\]
(iii) \[\ce{Fe2O3 + 3C -> 2Fe + 3CO}\]
(iv) \[\ce{CaO + SiO2 -> CaSiO3}\]
उत्तर
(i) \[\ce{Fe2O3 + 3CO -> 2Fe + 3CO2}\]
(iv) \[\ce{CaO + SiO2 -> CaSiO3}\]
Explanation:
In blast furnace during extraction of iron, the following two are main reactions.
(i) Reduction of \[\ce{Fe2O3}\] with \[\ce{CO}\]
\[\ce{Fe2O3 + CO -> 2FeO + CO2}\]
\[\ce{2FeO + 2CO -> Fe + 2CO2}\]
\[\ce{Fe2O3 + 3CO -> 2Fe + 3CO2}\]
(ii) Slag formation, \[\ce{CaO + SiO2 -> \underset{Fusible slag}{CaSiO3}}\]
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Match List I with List II.
| List - I | List - II | ||
| a. | Siderite | I. | FeCO3 |
| b. | Malachite | II. | CuCO3 · Cu(OH)2 |
| c. | Sphalerite | III. | ZnS |
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| List - I | List - II | ||
| (One) | (Composition) | ||
| (A) | Siderite | (I) | FeCO3 |
| (B) | Malachite | (II) | CuCO3 · Cu(OH)2 |
| (C) | Sphalerite | (III) | ZnS |
| (D) | Calamine | (IV) | ZnCO3 |
Choose the correct answer from the options given below:
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