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Iron galvanized with zinc is cathodically protected from corrosion. This is because?

Chemistry
JAMB 1990

Iron galvanized with zinc is cathodically protected from corrosion. This is because?

  • A. zinc has a more positive oxidation potential than iron
  • B. zinc has less positive oxidation potential than iron
  • C. bith have the same oxidation potential
  • D. zinc is harder than iron
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Correct Answer: Option A
Explanation

Iron galvanized with zinc is cathodically protected from corrosion because Zinc has a more positive oxidation potential than iron. This means that Zinc will preferentially corrode, acting as a sacrificial anode.

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