question_answer

A solution containing one mol per liter each of \[Cu{{(N{{O}_{3}})}_{2}},\] \[AgN{{O}_{3}},\] \[Hg{{(N{{O}_{3}})}_{2}}\] and \[Mg{{(N{{O}_{3}})}_{2}}\] is being electrolysed by using inert electrodes. The values of the standard oxidation potentials in volts are \[Ag/A{{g}^{+}}=-0.8V;\] \[Hg/H{{g}^{2+}}=-0.79V;\]. The order in which metals will be formed at cathode will be -

A)  \[Ag,\text{ }Cu,\text{ }Hg,\text{ }Mg\]

B)  \[Ag,\text{ }Hg,\text{ }Cu,\text{ }Mg\]

C)  \[Ag,Hg,Cu\]

D)     \[Cu,Hg,Ag\]