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प्रश्न
Explain the following:
Generally sulphide ores are converted into oxides before reduction.
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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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संबंधित प्रश्न
How is ‘cast iron’ different from ‘pig iron’?
Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
The impurity that is added externally to remove the impurity already present in the ore is known as ____________.
Below point ‘A’ \[\ce{FeO}\] can ______.
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
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:-
Heating of MgCl2 6H2O in absence of HCl gives ______.
Carbon deposition reaction taking place in ______.
Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]
The number of CN− ions involved in the balanced equation is ______.
