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General Principles And Processes of Isolation Of Elements
Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?
Fe
Zn
Cu
Mg
D.
Mg
The metal which is more reactive than 'Al' can reduce alumina. Also, according to the Ellingham diagram, Mg has more –ΔG value then alumina. Metals which has more –ΔG value can reduce those metals oxide which has less –ΔG value.
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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?
What is the role of graphite rod in the electrometallurgy of aluminium?
Predict conditions under which Al might be expected to reduce MgO.
Define the term gangue or matrix.
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