What is the change in oxidation number of $Pb$ at the positive electrode of a lead accumulator acting as a galvanic cell?

Derive the relation between the dissociation constant $K_a$ and the limiting molar conductivity $\Lambda_m^o$ for a solution of a weak electrolyte.

Select the incorrect option,when a lead storage battery is discharged $-$

What will occur if a block of copper metal is dropped into a beaker containing a solution of $1 \ M \ ZnSO_4$?

The metals that are employed in the battery industries are
$A$. $Fe$ $B$. $Mn$ $C$. $Ni$ $D$. $Cr$ $E$. $Cd$
Choose the correct answer from the options given below:

For the Galvanic cell:
$Ag_{(s)} \, | \, Ag_2C_2O_{4(s)} \, | \, C_2O_4^{2-} (0.02 \ M) \, || \, Ag^{+}(0.5 \ M) \, | \, Ag_{(s)}$
$EMF$ of the cell is $0.264 \ V$ at $25 \ ^oC$. The $K_{sp}$ of $Ag_2C_2O_{4(s)}$ is:
$[Given: \frac{2.303RT}{F} = 0.06, \ \log 2 = 0.3]$