Peroxodisulphate salts $\left({\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_8\right)$ are strong oxidizing agents used as bleaching agents for fats, oil etc. 
Given

$\begin{array}{ll}{\mathrm{O}}_2\left(\mathrm{g}\right)+4{\mathrm{H}}^{\oplus }\left(\mathrm{aq}\right)+4{\mathrm{e}}^{-}⟶2{\mathrm{H}}_2\mathrm{O}\left(\ell \right)& \mathrm{E}°=1.23\mathrm{V}\end{array}$

$\begin{array}{ll}{\mathrm{S}}_2{\mathrm{O}}_8^{-2}+2{\mathrm{e}}^{-}⟶2{\mathrm{SO}}_4^{-2}\left(\mathrm{aq}\right)& \mathrm{E}°=2.01\mathrm{V}\end{array}$

Which of the following statements is (are) correct?

In the galvanic cell, $\mathrm{Cu}$ $\left| {\mathrm{Cu}}^{2+} \Vert {\mathrm{Ag}}^{+} \right| \mathrm{Ag},$ the electrons flow from $\mathrm{Cu}$ electrode to $\mathrm{Ag}$ electrode. Answer the following questions regarding this cell:

(i) Which metal has greater tendency to loss electron $\mathrm{Cu}$or $\mathrm{Ag}$?

In the galvanic cell, $\mathrm{Cu}$$\left| {\mathrm{Cu}}^{2+} \Vert {\mathrm{Ag}}^{+} \right| \mathrm{Ag},$ the electrons flow from $\mathrm{Cu}$ electrode to $\mathrm{Ag}$ electrode. Answer the following questions regarding this cell:

(j) Which is the more reactive metal $\mathrm{Cu}$or $\mathrm{Ag}$?

In the galvanic cell, $\mathrm{Cu}$$\left| {\mathrm{Cu}}^{2+} \Vert {\mathrm{Ag}}^{+} \right| \mathrm{Ag},$ the electrons flow from $\mathrm{Cu}$ electrode to $\mathrm{Ag}$ electrode. Answer the following questions regarding this cell:

(k) What is the function of salt bridge represented by the symbol $\Vert ?$