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प्रश्न
Wrought iron is the purest form of iron. Write a reaction used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, silicon and phosphorus be removed from cast iron?
उत्तर
\[\ce{Fe2O3 + 3C -> 2Fe + 3CO}\]
Limestone is added as flux and sulphur, silicon and phosphorus change to their oxides and pass into the slag.
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संबंधित प्रश्न
How is 'cast iron' different from 'pig iron'?
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?
Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
Write chemical reactions taking place in the extraction of zinc from zinc blende.
State the role of silica in the metallurgy of copper.
The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.
Choose the correct option of temperature at which carbon reduces \[\ce{FeO}\] to iron and produces \[\ce{CO}\].
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.
Explain the following:
Carbon and hydrogen are not used as reducing agents at high temperatures.
Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
