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| Q. |
The rusting of iron is a/an - |
| A. | physical change |
| B. | electrochemical change |
| C. | electrical change |
| D. | None of the above |
| Answer» B. electrochemical change | |
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Explanation: When iron is exposed to air and moisture, its surface gradually corroded and converted into a brown mass. The rusting of iron is due to the formation of hydrated ion. Rusting is an electro-chemical process. |
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