Rusting of iron is catalysed by which of the | vedclass

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(D) The rusting of iron is an electrochemical process. In the presence of moisture and oxygen,the surface of iron acts as a small electrochemical cell

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$H^{+}$

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(D) The rusting of iron is an electrochemical process. In the presence of moisture and oxygen,the surface of iron acts as a small electrochemical cell. The reaction at the anode is the oxidation of iron: $2Fe(s) \rightarrow 2Fe^{2+} + 4e^-$. The reaction at the cathode involves the reduction of oxygen in the presence of $H^{+}$ ions: $O_2(g) + 4H^{+}(aq) + 4e^- \rightarrow 2H_2O(l)$. Thus,the presence of $H^{+}$ ions catalyses the cathodic reaction,thereby accelerating the rusting process.

Rusting of iron is catalysed by which of the following?

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