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Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
A
zinc has lower negative electrode potential than iron
B
zinc has higher negative electrode potential than iron
C
zinc is lighter than iron
D
zinc has lower melting point than iron
Explanation
More reactive zinc protects iron.
Detailed Solution
Zinc has a higher negative electrode potential than iron, so iron cannot be coated on zinc (zinc protects iron sacrificially).
