Q.

Zinc is used to protect corrosion of iron because

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a

Eoxi of Zn < Eoxi of iron

b

Ered of Zn < Ered of iron

c

Zn is cheaper than iron

d

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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