Q.

 Zinc is used in galvanizing Iron because

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a

 Zinc is cheaper than iron

b

SOP of zinc is higher than SOP of Iron

c

Zinc is an amphoteric metal

d

SRP of Zn is higher than SRP of Fe

answer is B.

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Detailed Solution

SOP of Zn > SOP of Fe, thus Zn protects Iron from oxidation (corrosion). 

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 Zinc is used in galvanizing Iron because