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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

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?

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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?

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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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पाठ 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८२]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
पाठ 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 29 | पृष्ठ ८२

संबंधित प्रश्‍न

Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?


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.


The impurity that is added externally to remove the impurity already present in the ore is known as ____________.


In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \[\ce{Cu2O}\] with ______.


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?


How is copper extracted from low grade copper ores?


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.


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.


Explain the following:

Generally sulphide ores are converted into oxides before reduction.


Explain the following:

Silica is added to the sulphide ore of copper in the reverberatory furnace.


Explain the following:

Carbon and hydrogen are not used as reducing agents at high temperatures.


Carbon deposition reaction taking place in ______.


Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.


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