When a lead storage battery is charged:

On the basis of the information available from the reaction $\frac{4}{3} Al + O_2 \to \frac{2}{3} Al_2O_3$,$\Delta G = -827 \ kJ \ mol^{-1}$ of $O_2$,the minimum emf required to carry out an electrolysis of $Al_2O_3$ is $............... \ V$

Which of the following statements is not true for a fuel cell?

Which of the following statements regarding a mercury battery is $NOT$ true?

Give true $(T)$ and false $(F)$ for following statements :
$(1)$ There is no difference between the galvanic and the electrolytic cell.
$(2)$ In electrolytic cell,anode of galvanic cell is cathode and cathodes are anode.
$(3)$ The flow of current and electron in electrolytic cell is opposite to the galvanic cell.
$(4)$ When $2.0 \ V$ external current in the opposite direction is passed through the Daniell cell,in such condition there is no effect on Daniell 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 $E^o_{Ag^{+}|Ag} = 0.80 \ V$.