Question

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

विकल्प

• Produce high purity water

• Created defection difference between two electrodes

• Generated heat

• Remove absorbed oxygen form electron surface

Answer 1

Created defection difference between two electrodes

Explanation:

$$\mathrm{Cathode}:\mathrm{O}{\phantom{A}}_2(\mathrm{g})+2\mathrm{H}{\phantom{A}}_2\mathrm{O}(\mathrm{l})+4\mathrm{e}{\phantom{A}}^{-}⟶4\mathrm{OH}{\phantom{A}}^{-}(\mathrm{aq})$$
$$\underset{―}{\mathrm{Anode}:2\mathrm{H}{\phantom{A}}_2(\mathrm{g})+4\mathrm{OH}{\phantom{A}}^{-}(\mathrm{aq})⟶4\mathrm{H}{\phantom{A}}_2\mathrm{O}(\mathrm{l})+2\mathrm{e}{\phantom{A}}^{-}}$$

$$\underset{―}{\mathrm{Overall}:2\mathrm{H}{\phantom{A}}_2(\mathrm{g})+\mathrm{O}{\phantom{A}}_2(\mathrm{g})⟶2\mathrm{H}{\phantom{A}}_2\mathrm{O}(\mathrm{l})\phantom{...........}}$$

Due to potential difference between cathode and anode, production of electricity is possible.