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A fuel cell is...

A fuel cell is

A

The voltaic cells in which continuous supply of fuels are at anode to give oxidation

B

The voltaic cell in which fuels such as, `CH_(4), H_(2), CO` are used at anode

C

It involves the reactions of `H_(2)-O_(2)` fuel cell such as, Anode : `2H_(2)+ 4OH^(-) rarr 4H_(2)O_((I)) + 4e` Cathode `O_(2) + 2H_(2)O_((I)) + 4e rarr 4OH^(-)`

D

The efficiency of a `H_(2)-O_(2)` fuel cell is 23%

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The correct Answer is:
A, B, C
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