# The standard electrode potentials of $zn,Ag$ and $Cu$ are $-0.76,0.80$ and $0.34$ volt respectively ; then
$\begin{array}{1 1} \text{Ag can oxidised Zn and Cu } \\ \text{Ag can reduced$Zn^{2+}$and$Cu^{2+}$} \\ \text{Zn can reduced$Ag^{+} $and$Cu^{2+}$} \\ \text{Cu can oxidised Zn and Ag } \end{array}$