What is the final oxidation state of manganese after the electrochemical reactions in a dry cell?(a) +4(b) +3(c) +2(d) +1This question was addressed to me at a job interview.My doubt stems from Electrochemistry in section Electrochemistry of Chemistry – Class 12

What is the final oxidation state of manganese after the electrochemic

1.	What is the final oxidation state of manganese after the electrochemical reactions in a dry cell?(a) +4(b) +3(c) +2(d) +1This question was addressed to me at a job interview.My doubt stems from Electrochemistry in section Electrochemistry of Chemistry – Class 12
Answer» Right choice is (b) +3 The BEST explanation: In a DRY cell, in the cathode reaction, manganese dioxide(MnO2) is reduced to form manganese oxide-hydroxide(MNO(OH)). In this process, the oxidation state of manganese changes from +4 to +3. Hence the final oxidation state of manganese is +3.

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