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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) \[\ce{CaO + SiO2 -> CaSiO3}\]
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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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संबंधित प्रश्न
The process of leaching alumina, using sodium carbonate is called
- Bayer's process
- Decomposition
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- Hall's process
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(A) ferrous sulphide
(B) ferrous oxide
(C) cuprous sulphide
(D) cuprous oxide
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
What is the role of cryolite in the extraction of aluminium?
What is the role of limestone in the extraction of iron from its oxides?
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What is the role of coke in the extraction of iron from its oxides?
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
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Passivation
In the extraction of zinc from zinc blende:
(i) Give an equation to show how zinc oxide is converted to zinc.
(ii) How is impure zinc finally electro-refined?
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(i) lower the melting point of \[\ce{Al2O3}\].
(ii) increase the conductivity of molten mixture.
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(iv) acts as catalyst.
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(i) \[\ce{CaCo3 -> CaO + CO2}\]
(ii) \[\ce{2FeS2 + 11/2 O2 -> Fe2O3 + 4SO2}\]
(iii) \[\ce{Al2O3. {x}H2O -> Al2O3 + {x}H2O}\]
(iv) \[\ce{ZnS + 3/2 O2 -> ZnO + SO2}\]
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