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Corrosion is an electrochemical phenomenon. The oxygen in moist air reacts as follows:

Class 12th Chemistry, Question -Corrosion is an electrochemical phenomenon. The oxygen in moist air reacts as follows:

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February 13, 2023

Question 8:Corrosion is an electrochemical phenomenon. The oxygen in moist air reacts as
follows:

O2(g) + 2H2O(l) + 4e– → 4OH–(aq).

The correct answer is -Anode: Zn (s)  Zn2+ (aq) + 2 e- (1/2)
Cathode: O2(g) + 2H2O(l) + 4e– → 4OH–(aq).
Overall: 2 Zn (s) + O2(g) + 2H2O(l)  2 Zn2+ (aq) + 4OH–(aq)
2 Zn (s) + O2(g) + 2H2O(l)  2 Zn(OH)2 (ppt)