Question

In $ {{H}_{2}}-{{O}_{2}} $ fuel cell, the reaction occurring at cathode, is

• A. $ 2{{H}_{2}}+{{O}_{2}}\xrightarrow{{}}2{{H}_{2}}O(l) $
• B. $ {{H}^{+}}+O{{H}^{-}}\xrightarrow{{}}{{H}_{2}}O $
• C. $ {{O}_{2}}+2{{H}_{2}}O+4{{e}^{-}}\xrightarrow{{}}4O{{H}^{-}} $
• D. $ {{H}^{+}}+{{e}^{-}}\xrightarrow{{}}\frac{1}{2}{{H}_{2}} $

Answer 1

Answer: (C)

In hydrogen-oxygen fuel cell, the following reaction occurs at cathode, $ {{O}_{2}}+2{{H}_{2}}O+4{{e}^{-}}\xrightarrow{{}}4O{{H}^{-}} $