First slide

Corrosion

Question

Mark the incorrect statement(s) for fuel cells.

Easy

A

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

Hydrogen and oxygen are bubbled through porous carbon electrodes
C

Catalyst like finely divided Pt or Pd are incorporated into electrodes
D

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

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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