Which of the following statements regarding fuel cell is (are) true?

They have efficiency of about 60-70%

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There efficiency is less then conventional methods

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They do not cause pollution

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They can supply indefinite amount of energy until outside supply of reactants is maintained

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Solution

The correct options are
A They have efficiency of about 60-70%
C They can supply indefinite amount of energy until outside supply of reactants is maintained
D They do not cause pollution
Fuel cells have efficiency of 60-70%. Reactants, products and catalyst used are non- toxic, thus, they are pollution-free. And they can supply indefinite amount of energy until outside supply of reactants like H $_{2}$ and O $_{2}$ is maintained.

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Similar questions

A fuel cell is:

I.A voltaic cell in which continuous supply of fuels are sent at anode to perform oxidation.

II. A voltaic cell in which fuels such as :

$C H_{4}, H_{2}$ and CO are used up at anode.

III. One which involves the reaction of $H_{2} O_{2}$ fuel cell such as:

Anode : $2 H_{2} + 4 ⊖ O H \to 4 H_{2} O (l) + 4 e^{-}$

Cathode : $O_{2} + 2 H_{2} O (l) + 4 e^{-} \to 4 ⊖ O H$

IV. The efficiency of $H_{2} - O_{2}$ fuel cell is $70$ to $75 %$ .

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