Which among the given metals is the most suitable one for galvanizing iron?

Z n

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C u

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K

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A l

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Solution

The correct option is A $Z n$
Zinc is more reactive than iron, it is used to protect iron from corrosion because when oxygen in the air reacts with the surface of zinc, a very dense and impermeable coating of zinc oxide is formed and it is this physical barrier that protects the zinc surface from further attack.

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