Which metal cannot be obtained by the electro | vedclass

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(B) Highly reactive metals with reduction potentials significantly lower than that of hydrogen (e.g.,$Mg, Al, Na, Ca$) cannot be obtained by the elect

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Magnesium

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(B) Highly reactive metals with reduction potentials significantly lower than that of hydrogen (e.g.,$Mg, Al, Na, Ca$) cannot be obtained by the electrolysis of their aqueous salt solutions.This is because water molecules are reduced at the cathode in preference to these metal cations $(2H_2O + 2e^- \rightarrow H_2 + 2OH^-)$.Among the given options,$Magnesium$ $(Mg)$ has a standard reduction potential $(E^o = -2.37 \ V)$ which is much lower than that of hydrogen $(E^o = 0.00 \ V)$.Therefore,$Magnesium$ is obtained by the electrolysis of its molten salt,not its aqueous solution.

Which metal cannot be obtained by the electrolysis of its aqueous salt solution?

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