Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
Question
In the rusting of iron, iron has been$:$
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Answer
In corrosion, metal is oxidised by loss of electrons to oxygen to form metal oxide. In rusting of iron, at one spot of the iron object oxidation occurs and that spot behaves as an anode.
Anode$:Fe(s) \rightarrow Fe^{2+ }(aq) + 2e^−$
Cathode$: 4e^{- }+ 4H^+(aq) + O_2(aq) \rightarrow 2H_2O(l)$
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