electrochemistry

Question: Which of the following reactions occurs at the cathode of a common dry cell

1) $Mn\to M{{n}^{2+}}+2{{e}^{-}}$

2) $2Mn{{O}_{2}}+Z{{n}^{2+}}+2{{e}^{-}}\to ZnM{{n}_{2}}{{O}_{4}}$

3) $2Zn{{O}_{2}}+M{{n}^{2+}}+2{{e}^{-}}\to MnZ{{n}_{2}}{{O}_{4}}$

4) $Zn\to Z{{n}^{2+}}+2{{e}^{-}}$

Solution:

Explanation: No Explanation

Electrochemical cells

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