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In a hydrogen-oxygen fuel cell, combusti...

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

A

Produce high purity water

B

Create potential difference between the two electrodes

C

Generate heat

D

Remove adsorbed oxygen from electrode surfaces

Text Solution

Verified by Experts

The correct Answer is:
B
In hydrogen-oxygen fuel cell following reactions take place to create potential difference between two electrodes.
`2H_(2(g))+4OH_((aq))^(-)to4H_(2)O_((l))+4e^(-)`
`underline(O_(2(g))+2H_(2)O_((l))+4e^(-)to4OH_((aq))^(-)" ")`
Overall reaction=`2H_(2(g))+O_(2(g))to2H_(2)O_((l))`
the net reaction is the same as burning (combustion) of hydrogen to form water.
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