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Zinc can be coated on iron to produce galvanized iron but thereverse is notpossible. It is because

Answer»

Zinc is lighter than iron
Zinc has LOWER melting point than iron
Zinc has lower negative electrode potential than iron
Zinc has higher negative electrode potential than iron

Solution :Zinc has higher negative electrode potential than iron
HINT : `E_(ZN^(+)|Zn)^(@)=-0.76V and E_(FE^(2+)|Fe)^(@)=-0.44V`. Zinc has higher negative electrode potential than iron, iron cannot be coated on zinc.


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