The electrolyte used in a mercury cell is:

Select the correct cell reaction for the cell $Pt_{(s)}|Cl_{2(g)}|Cl^{-}_{(aq)}||Ag^{+}_{(aq)}|Ag_{(s)}$.

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

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:

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

In batteries and fuel cells,which energy is converted into which energy?