Which of the following metals cannot be used to be electroplated on the surface of another metal using an aqueous electrolyte?

Nickel

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Copper

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Magnesium

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Silver

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Solution

The correct option is C
Magnesium

In an aqueous solution, water will be reduced in preference to the magnesium ion. Therefore, magnesium could not be plated from an aqueous solution. Silver, Copper and Nickel are commonly electroplated using a reducing electrolyte.

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