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The passage of current through the solut...

The passage of current through the solution of a certain electrolyte results in the liberation of `H_2` at the cathode and `Cl_2` gas at anode. The solution in the container could not be

A

`NaCl(aq)`

B

`KCl(aq)`

C

`CuCl_2(aq)`

D

`MgCl_2(aq)`

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