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General Principles And Processes of Isolation Of Elements
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is
Ag
Ca
Cu
Cr
C.
Cu
Higher the position of the element in electrochemical series more difficult is the reduction of its cations.
If Ca2+ (aq) is electrolyzed, water is reduced in preference to it. Hence, It cannot be reduced electrically from their aqueous solution.
Ca2+ (aq) + H2O → Ca2+ +OH- +H2
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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.
Define the term flux.
Deine the term slag.
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