Give the uses of the mercury cell.

Which of the following statements is $NOT$ correct for $H_2-O_2$ fuel cell?

Which of the following statements is incorrect during the discharge of a lead storage battery?

The acid used in lead storage battery is

In a $Cu-Zn$ electrochemical cell:

If the standard $emf$ of the cell $Zn_{(s)} | Zn_{(1 \ M)}^{+2} || Ag_{(1 \ M)}^{+1} | Ag_{(s)}$ is $1.55 \ V$, what is the electrical work done under standard conditions (in $kJ$)?