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Explain the following: Generally sulphide ores are converted into oxides before reduction. - Chemistry

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प्रश्न

Explain the following:

Generally sulphide ores are converted into oxides before reduction.

दीर्घउत्तर
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उत्तर

Sulphide ores cannot be reduced easily but oxide ores can be easily reduced, hence sulphide ores are generally converted into oxides before reduction.

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अध्याय 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८६]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
अध्याय 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 55.(b) | पृष्ठ ८६

संबंधित प्रश्न

Is it true that under certain conditions, Mg can reduce SiO2 and Si can reduce MgO? What are those conditions?


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.


State the role of silica in the metallurgy of copper.


Write chemical reactions taking place in the extraction of copper from Cu2 S. 


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 ______.


In the metallurgy of aluminium ______.


Below point ‘A’ \[\ce{FeO}\] can ______.


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?


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.


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:

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.


A cuprous ore among the following is:-


\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]

The number of CN ions involved in the balanced equation is ______.


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