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2015-07-02T22:09:33+05:30

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It is a chemical change, which cannot be reversed by reversing the conditions.
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2015-07-02T22:18:01+05:30

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Rusting is a chemical as well as a physical change
chemical- bcz there's a change in chemical composition which can't be reversed
physical-bcz on rusting the appearance of iron also changes
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