Question:
In galvanised iron
In galvanised iron
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In galvanised iron, zinc protects iron by acting as sacrificial anode.
Updated On: May 7, 2026
- Zn acts as anode and Fe acts as cathode
- Zn acts as cathode and Fe acts as anode
- Sn acts as anode and Fe acts as cathode
- Sn acts as cathode and Fe acts as anode
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The Correct Option is A
Solution and Explanation
Concept:
Galvanisation is the process of coating iron with zinc to protect iron from corrosion.
Step 1: In galvanised iron, iron is coated with zinc: \[ Fe \text{ coated with } Zn \]
Step 2: Zinc is more electropositive than iron and has a greater tendency to oxidize.
Step 3: Therefore, zinc acts as sacrificial anode: \[ Zn \rightarrow Zn^{2+}+2e^- \]
Step 4: Iron is protected and behaves as cathode. Thus: \[ Zn=\text{anode} \] and \[ Fe=\text{cathode} \] Therefore, \[ \boxed{\text{Zn acts as anode and Fe acts as cathode}} \]
Step 1: In galvanised iron, iron is coated with zinc: \[ Fe \text{ coated with } Zn \]
Step 2: Zinc is more electropositive than iron and has a greater tendency to oxidize.
Step 3: Therefore, zinc acts as sacrificial anode: \[ Zn \rightarrow Zn^{2+}+2e^- \]
Step 4: Iron is protected and behaves as cathode. Thus: \[ Zn=\text{anode} \] and \[ Fe=\text{cathode} \] Therefore, \[ \boxed{\text{Zn acts as anode and Fe acts as cathode}} \]
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