In the reaction $Cu_{(s)} + 2Ag^{+}_{(aq)} \to Cu^{2+}_{(aq)} + 2Ag_{(s)}$,the reduction half-cell reaction is:

Write a note on mercury cell $(Zn-Hg)$.

Give the uses of the lead storage cell.

The efficiency of a fuel cell is given by

$E^{\circ}_{Cu^{2+}|Cu} = +0.34 \ V$
$E^{\circ}_{Zn^{2+}|Zn} = -0.76 \ V$
Identify the incorrect statement from the options below for the above cell.

Draw the diagram of a galvanic cell and indicate the direction of flow of electrons and current for the cell constructed using $Al|Al^{3+}$ and $Ag^{+}|Ag$ half-cells,given $E^o_{Al^{3+}|Al} = -1.66 \ V$ and $E^o_{Ag^{+}|Ag} = 0.80 \ V$.