The number of faradays required to produce one mole of water from a hydrogen - oxygen fuel cell containing aqueous alkali as electrolyte is:
Correct answer: C. 2
- A. 1
- B. 3
- C. 2
- D. 4
Explanation
The correct answer is 2 Faradays. This is based on Faraday's law of electrolysis, which states that the amount of substance produced at an electrode during electrolysis is proportional to the quantity of electricity passed. In this case, to produce one mole of water, one mole of H2 gas reacts with 1/2 mole of O2 gas, requiring 2 Faradays (1 Faraday for each mole of electrons per mole of hydrogen gas). Options A, B, and D are incorrect as they do not match the stoichiometry of the reaction and the requirements set by Faraday's law.
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