$A$ concentrated solution of lead nitrate in water can be stored in

When a lead storage battery is charged,it acts as a:

$A$ concentrated solution of $KNO_3$ is used in the preparation of a salt bridge because:

Consider the figure and answer the following questions.
$(i)$ Cell $'A'$ has $E_{cell} = 2 \ V$ and cell $'B'$ has $E_{cell} = 1.1 \ V$. Which of the two cells,$'A'$ or $'B'$,will act as an electrolytic cell? Which electrode reactions will occur in this cell?
$(ii)$ If cell $'A'$ has $E_{cell} = 0.5 \ V$ and cell $'B'$ has $E_{cell} = 1.1 \ V$,then what will be the reaction at the anode and cathode?

What is the density of a solution of sulphuric acid used as an electrolyte in lead accumulators (in $g \ mL^{-1}$)?

Whose oxidation and reduction is carried out in a hydrogen-oxygen fuel cell?