Explain the following:
Partial roasting of sulphide ore is done in the metallurgy of copper.
Partial reduction of sulphide ores give copper oxide which further reacts with copper sulphide to show auto reduction.
2CuS +3O2 -> 2CuO + 2SO2
Is it true that under certain conditions. Mg can reduce Al2O3 and Al can reduce MgO? What are those conditions?
Titanium is a metal of modern times. It is obtained as oxide. Why it could not be extracted earlier despite its wide occurence?
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?
What criterion is followed for the selection of the stationary phase in chromatography?
What is the role of cryolite in the metallurgy of aluminium?
Why is zinc not extracted from zinc oxide through reduction using CO?
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