Electrolysis involves oxidation and reduction respectively at

The product,which is not obtained during the electrolysis of brine solution,is

Given below are two statements $:$
$1 \ M$ aqueous solution of each of $Cu(NO_3)_2, AgNO_3, Hg_2(NO_3)_2$ and $Mg(NO_3)_2$ are electrolysed using inert electrodes.
Given $: E_{Ag^{+}/Ag}^{\theta} = 0.80 \ V, E_{Hg_2^{2+}/Hg}^{\theta} = 0.79 \ V, E_{Cu^{2+}/Cu}^{\theta} = 0.24 \ V$ and $E_{Mg^{2+}/Mg}^{\theta} = -2.37 \ V$.
Statement $(I) :$ With increasing voltage,the sequence of deposition of metals on the cathode will be $Ag, Hg$ and $Cu$.
Statement $(II) :$ Magnesium will not be deposited at cathode instead oxygen gas will be evolved at the cathode.
In the light of the above statement,choose the most appropriate answer from the options given below.

Which compound gives the same product on electrolysis of fused metal salt and concentrated aqueous solution?

In the electrolysis of dilute $H_2SO_4$ using platinum electrodes:

When an aqueous solution of $CuCl_2$ is electrolysed using $Pt$ inert electrodes,the reactions at the cathode and anode respectively are: