QUESTION #45 Electrolysis and Discharge Potential

Given below are two statements: 1text M$1\text{ M}$ aqueous solution of each of textCu(NO_3)_2$\text{Cu(NO}_3)_2$, textAgNO_3$\text{AgNO}_3$, textHg_2(textNO_3)_2$\text{Hg}_2(\text{NO}_3)_2$; textMg(NO_3)_2$\text{Mg(NO}_3)_2$ are electrolysed using inert electrodes, Given: E_textAg^+/textAg^theta = 0.80textV$E_{\text{Ag}^{+}/\text{Ag}}^{\theta} = 0.80\text{V}$ , E_textHg_2^2+/textHg^theta = 0.79textV$E_{\text{Hg}_2^{2+}/\text{Hg}}^{\theta} = 0.79\text{V}$, E_textCu^2+/textCu^theta = 0.24textV$E_{\text{Cu}^{2+}/\text{Cu}}^{\theta} = 0.24\text{V}$ and E_textMg^2+/textMg^theta = -2.37textV$E_{\text{Mg}^{2+}/\text{Mg}}^{\theta} = -2.37\text{V}$ Statement (I): With increasing voltage, the sequence of deposition of metals on the cathode will be textAg$\text{Ag}$, textHg$\text{Hg}$ and textCu$\text{Cu}$ 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 [cite: 426, 427]

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