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प्रश्न
The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving reaction.
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उत्तर
Haematite\[\ce{(Fe2O3)}\] is used. It supplies the oxygen and oxidises carbon, silicon, manganese and phosphorus present in the cast iron to \[\ce{CO}\], \[\ce{SiO2}\], \[\ce{MnO}\] and \[\ce{P2O5}\] respectively.
\[\ce{Fe2O3 + 3C ->[Heat] 2Fe + 3CO}\]
\[\ce{3Si + 2Fe2O3 -> 4Fe + 3SiO2}\]
\[\ce{3S + 2Fe2O3 -> 3SO2 + 4Fe}\]
\[\ce{CO}\] and \[\ce{SO2}\] escape and \[\ce{MnO}\] and \[\ce{SiO2}\] combine to form manganous silicate \[\ce{(MnSiO3)}\] as slag.
\[\ce{MnO + SiO2 ->[Heat] \underset{Manganous silicate (Slag)}{MnSiO3}}\]
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संबंधित प्रश्न
The reaction,
Cr2O3 + 2Al → Al2O3 + 2Cr
(ΔGθ = -421kJ) is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?
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Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
Write chemical reactions taking place in the extraction of zinc from zinc blende.
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In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \[\ce{Cu2O}\] with ______.
In the metallurgy of aluminium ______.
Choose the correct option of temperature at which carbon reduces \[\ce{FeO}\] to iron and produces \[\ce{CO}\].
Below point ‘A’ \[\ce{FeO}\] can ______.
For the reduction of \[\ce{FeO}\] at the temperature corresponding to point D, which of the following statements is correct?
For the metallurgical process of which of the ores calcined ore can be reduced by carbon?
(i) Haematite
(ii) Calamine
(iii) Iron pyrites
(iv) Sphalerite
The mixture of compounds A and B is passed through a column of \[\ce{Al2O3}\] by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?
Why is sulphide ore of copper heated in a furnace after mixing with silica?
Write down the reactions taking place in Blast furnace related to the metallurgy of iron in the temperature range 500-800 K.
Heating of MgCl2 6H2O in absence of HCl gives ______.
Carbon deposition reaction taking place in ______.
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is ______.
