Question

The spot at which corrosion occurs on the surface of an iron material, behaves as

• A. cathode
• B. anode
• C. either cathode or anode
• D. It has no relation with electrode

Answer 1

The Correct Option is B

Correct answer: anode
 
Explanation:
In the process of corrosion of iron (like rusting), the spot where iron corrodes acts as the anode. At the anode, iron loses electrons and gets oxidized to form iron ions: 
$\text{Fe} \rightarrow \text{Fe}^{2+} + 2e^-$
These electrons travel to another spot (the cathode), where they reduce oxygen in the presence of water. Thus, the corroding spot is the anode.