[zinc has higher negative ...] Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

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Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

zinc has higher negative electrode potential than iron

zinc is lighter than iron

zinc has lower melting point than iron

zinc has lower negative electrode potential than iron

Explanation:

E0
Zn⁺² / Zn = – 0.76 V

E0
Fe⁺² / Fe = – 0.76 V

Zn has higher negative SRP (Standard reduction potential) so it works as anode and protect iron to make iron as cathode.

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