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Electrolysis and Electrolytes

Which one of ...

Question

Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts

[IIT 1990]

A

Ag

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B

Mg

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C

Cu

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D

Cr

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Solution

The correct option is B
Mg

The reduction potential of Mg is less than that of water . Hence

their ions in the aqueous solution cannot be reduced instead water will be

reduced

.

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