Mark the incorrect statement(s) for fuel cells.

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It is used in Apollo space programme and for drinking water supply for astronauts.

Hydrogen and oxygen are bubbled through porous carbon electrodes

Catalyst like finely divided Pt or Pd are incorporated into electrodes

Anode reaction is $O_{2} + 2 H_{2} O (l) + 4 e^{+} \to 4 {OH}^{-} (aq)$

answer is D.

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Detailed Solution

In hydrogen-oxygen fuel cell, anode reaction is $2 H_{2} (g) + 4 {OH}^{-} (aq) \to 4 H_{2} O (l) + 4 e^{-}$
Given reaction occurs at cathode.

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