precautions to be taken while investigating rusting of iron take place in presence of both air and water
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yes it takes place in the present of both air and water
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Anhydrous calcium chloride is drying agent. So, it is added into test tube C to absorb all the moisture present in the air of test tube. ... But the nail present in test tube A rusts because in test tube A the nail was exposed to both air and water. This shows that for rusting of iron both air and water are necessary.
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