Question

The metal that cannot be obtained by the electrolysis of an aqueous solution of its salts is ______.

Options

• Ag

• Ca

• Cu

• Cr

Answer 1

The metal that cannot be obtained by the electrolysis of an aqueous solution of its salts is Ca.

Explanation:

Calcium (Ca²⁺) has a very high reduction potential, so in aqueous solution, water gets reduced to hydrogen gas instead of Ca²⁺ being reduced to calcium metal. Hence, calcium cannot be obtained by electrolysis of its aqueous salt solution.