First slide

Corrosion

Question

Zinc is used to protect corrosion of iron because

Moderate

A

E_oxi of Zn < E_oxi of iron
B

E_red of Zn < E_red of iron
C

Zn is cheaper than iron
D

Zn is abundantly available

Solution

SRP of Zn (-0.76 V)< SRP of Fe (-0.44 V), Zn easily undergoes oxidation and thus prevents corrosion of Fe.

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