What happens during the discharge of a lead storage battery?

Determine True $(T)$ or False $(F)$ :
$1.$ In a battery,the conversion of electric energy into chemical energy is carried out.
$2.$ Batteries are current-generating instruments.

$Cu^{+}_{(aq)}$ is unstable in solution and undergoes simultaneous oxidation and reduction,according to the reaction $2 Cu^{+}_{(aq)} \rightleftharpoons Cu^{2+}_{(aq)} + Cu_{(s)}$. Choose the correct $E^{\circ}$ for the above reaction if $E^{\circ}_{Cu^{2+}/Cu} = 0.34 \ V$ and $E^{\circ}_{Cu^{2+}/Cu^{+}} = 0.15 \ V$.

Which one of the following is the correct plot of $\Lambda_m$ (in $S \ cm^2 \ mol^{-1}$) and $\sqrt{C}$ (in $mol^{1/2} \ L^{-1/2}$) for a $KCl$ solution? ($y=\Lambda_m$; $x=\sqrt{C}$)

Which metals are used as an anode and a cathode in a $Daniell$ cell?

Unlike dry cell,the mercury cell has a constant cell potential throughout its useful life. Why?