Zinc is used to protect corrosion of iron because

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Eoxi of Zn < Eoxi of iron

Ered of Zn < Ered of iron

Zn is cheaper than iron

Zn is abundantly available

answer is B.

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Detailed 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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