Which of the following changes takes place at | vedclass

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(C) In a dry cell (Leclanch&eacute; cell),the anode is the zinc container,where oxidation occurs: $Zn_{(s)} \rightarrow Zn^{2+}_{(aq)} + 2e^-$.
The c

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$MnO_{2_{(s)}}$ is reduced to $Mn_2O_{3_{(s)}}$

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(C) In a dry cell (Leclanch&eacute; cell),the anode is the zinc container,where oxidation occurs: $Zn_{(s)} ightarrow Zn^{2+}_{(aq)} + 2e^-$.
The cathode (positive electrode) is a graphite rod surrounded by powdered $MnO_2$ and carbon.
At the cathode,the reduction reaction occurs: $MnO_{2	ext{(s)}} + NH_4^+{_{	ext{(aq)}}} + e^{-} ightarrow MnO(OH)_{	ext{(s)}} + NH_{3	ext{(g)}}$.
This reaction involves the reduction of $Mn$ from the $+4$ oxidation state in $MnO_2$ to the $+3$ oxidation state in $MnO(OH)$,which is often represented as $Mn_2O_3$.
Thus,$MnO_{2_{(s)}}$ is reduced to $Mn_2O_{3_{(s)}}$.

Which of the following changes takes place at the positive electrode during the working of a dry cell?

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