Question:
Rusting of iron is catalysed by which of the following?
Rusting of iron is catalysed by which of the following?
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Rusting of iron is catalysed in the presence of H\(^+\) ions, as they help in electron transfer during oxidation.
Updated On: Apr 22, 2026
- Fe
- Zn
- O\(_2\)
- H\(^+\)
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The Correct Option is D
Solution and Explanation
Step 1: Identifying the rusting process.
Rusting of iron involves both electrochemical reactions and the presence of an electrolyte. The presence of oxygen (O\(_2\)) and moisture facilitates the process, but hydrogen ions (H\(^+\)) catalyse the rusting by lowering the potential for the oxidation of iron.
Step 2: Understanding the role of H\(^+\).
- (1) Fe: Iron itself is not a catalyst; it is the metal undergoing oxidation.
- (2) Zn: Zinc does not catalyse rusting; in fact, it is often used to protect iron through galvanization.
- (3) O\(_2\): While oxygen is necessary for rusting, it is not the catalyst.
- (4) H\(^+\): Hydrogen ions (acidic conditions) help in the corrosion process by facilitating the transfer of electrons during oxidation.
Step 3: Conclusion.
The correct answer is (4) H\(^+\).
Rusting of iron involves both electrochemical reactions and the presence of an electrolyte. The presence of oxygen (O\(_2\)) and moisture facilitates the process, but hydrogen ions (H\(^+\)) catalyse the rusting by lowering the potential for the oxidation of iron.
Step 2: Understanding the role of H\(^+\).
- (1) Fe: Iron itself is not a catalyst; it is the metal undergoing oxidation.
- (2) Zn: Zinc does not catalyse rusting; in fact, it is often used to protect iron through galvanization.
- (3) O\(_2\): While oxygen is necessary for rusting, it is not the catalyst.
- (4) H\(^+\): Hydrogen ions (acidic conditions) help in the corrosion process by facilitating the transfer of electrons during oxidation.
Step 3: Conclusion.
The correct answer is (4) H\(^+\).
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