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प्रश्न
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
उत्तर
(i) Haematite
(ii) Calamine
Explanation:
Oxides can be reduced by using carbon. Haematite \[\ce{(Fe2O3)}\] and calamine \[\ce{(ZnCO3 -> ZnO + CO2)}\] can be reduced by carbon.
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संबंधित प्रश्न
Why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction?
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.
How will you convert the following:
Zinc blende to Zinc metal
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:
\[\ce{CO2}\] is a better reducing agent below 710 K whereas \[\ce{CO}\] is a better reducing agent above 710 K.
Explain the following:
Generally sulphide ores are converted into oxides before reduction.
Heating of MgCl2 6H2O in absence of HCl gives ______.
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 ______.
