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

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).

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