Out of the following, the number of metals that cannot be obtained by electrolysis of the aqueous solution of their salts are
Ag, Mg, Cu, Al, Cr, Au, Ca, Na

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Solution

Mg, Al, Ca, Na can not be obtained in aqueous medium by electrolysis because of their reduction potential, so total 4 metals.

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Similar questions

Choose the metals, from the following, that are obtained by electrolysis of their salts:

$A l, N a, C u, A g, M g, C a$

Which one of the following metals cannot be obtained by electrolysis of aqueous solution of its salts?

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