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Which of the following reaction takes place at cathode in high temperature fuel cell using coal?(a) \(\frac{1}{2}\) O2+ CO2+ 2e^–→CO3^-2(b) C+2CO3^-2→3CO2+ 4e^–(c) CO+CO3^-2→2CO2+ 2e^–(d) H2+ CO3^-2→H2 O+CO2+ 2e^–I have been asked this question in an international level competition.Query is from Inorganic Chemical topic in portion Inorganic Chemical Industries of Chemical Technology

Answer»

Right answer is (a) \(\frac{1}{2}\) O2+ CO2+ 2e^–→CO3^-2

Best explanation: \(\frac{1}{2}\) O2+ CO2+ 2e^–→CO3^-2 being reduction REACTION takes place at cathode. C+2CO3^-2→3CO2+ 4e^– Is an ANODIC reaction for CH4, CO+CO3^-2→ 2CO2+ 2e^– is an anodic reaction for CO and H2+ CO3^-2 →H2 O+CO2+ 2e^– is an anodic reaction for H2.


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