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The emf of the cathode in the zinc-air batteries is __________(a) 0.1V(b) 0.2V(c) 0.3V(d) 0.4VI had been asked this question in an interview.My doubt is from Corrosion topic in division Electro Chemical Cells and Corrosion of Applied Chemistry

Answer» RIGHT OPTION is (d) 0.4V

Easiest explanation: The electromotive FORCE of the CATHODE of the zinc-air batteries is 0.4V. The cathode has the POSITIVE potential and the oxygen acts as the cathode.


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