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Question

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because :
  1. zinc has lower negative electrode potential than iron
  2. zinc has higher negative electrode potential than iron
  3. zinc has lower melting point than iron
  4. zinc is lighter than iron

A
zinc has higher negative electrode potential than iron
B
zinc has lower melting point than iron
C
zinc has lower negative electrode potential than iron
D
zinc is lighter than iron
Solution
Verified by Toppr

E0Zn2+|Zn= 0.76 V
E0Fe2+|Fe= 0.44 V
Zn has higher negative SRP (Standard reduction potential) so it works as anode and protects iron to make iron as the cathode.
Hence, option B is correct.

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