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Question
The rusting of an iron object is called :
Options
corrosion and it is a physical as well as a chemical change
dissolution and it is a physical change
corrosion and it is a chemical change
dissolution and it is a chemical change
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Solution
corrosion and it is a chemical change
Rusting of iron takes place in the presence of air (O2) and water vapour. Action of air and moisture on iron converts it to its oxide. This process is called corrosion and it leads to the formation of a new compound. Therefore, it is a chemical change.
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