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Chemistry · PYQ NEET UG 2016(2)

हिन्दी

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

  1. zinc has higher negative electrode potential than iron
  2. zinc is lighter than iron
  3. zinc has lower melting point than iron
  4. zinc has lower negative electrode potential than iron

Correct answer · Option 1

zinc has higher negative electrode potential than iron

Explanation

Zinc has a more negative standard reduction potential (\( -0.76\text{ V} \)) than iron (\( -0.44\text{ V} \)), making it a sacrificial anode that protects iron.
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