Give the uses of the mercury cell.

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

In a hydrogen-oxygen fuel cell,the combustion of hydrogen occurs to:

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

Give True $(T)$ or False $(F)$ :
$1.$ $H_2$ is used as fuel in fuel cell.
$2.$ Thermal plants are more pollutants as compared to fuel cell.
$3.$ Fuel cell is pollution free.

If $\lambda_{m}^{o}(Br^{-}) = 78.1 \, S \, cm^{2} \, mol^{-1}$,calculate $\lambda_{m}^{o}(K^{+})$ using the following data:

Electrolyte	$\Lambda_{m}^{o} \, (S \, cm^{2} \, mol^{-1})$
$NaCl$	$126.5$
$NaBr$	$128.2$
$KCl$	$149.5$