When a lead storage battery is charged,what happens?

Fill in the blanks :
$1.$ $E_{cell}^o$ of Daniell cell $= $ ........... .
$2.$ In Daniell cell,$n = $ ........... .
$3.$ For $Al + 3Ag^{+} \rightarrow Al^{3+} + 3Ag,$ $n = $ ...........

The following limiting molar conductivities are given as:
$\lambda_{m(H_{2}SO_{4})}^{0} = x \ S \ cm^{2} mol^{-1}$
$\lambda_{m(K_{2}SO_{4})}^{0} = y \ S \ cm^{2} mol^{-1}$
$\lambda_{m(CH_{3}COOK)}^{0} = z \ S \ cm^{2} mol^{-1}$
The $\lambda_{m}^{0} \ (\text{in } S \ cm^{2} mol^{-1})$ for $CH_{3}COOH$ will be:

In a fuel cell,$H_2$ and $O_2$ react to produce electricity. In this process,$H_2$ gas is oxidized at the anode and $O_2$ gas is reduced at the cathode. If $67.2 \ L$ of $H_2$ gas at $\text{STP}$ is consumed in $15 \ min$,what is the current produced (in $A$)?

Hydrogen-oxygen fuel cells are used in spacecraft to supply:

$A$ depolarizer used in dry cell batteries is