When iron rusts its weight hellip ........

General Studies (CGL) General Science

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When iron rusts, its weight …..

decreases

increases

remains the same

first increases and then decreases

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Explanation:

When rust forms, the mass of the iron object is increased with the mass of the oxygen.When iron or any other metal oxidizes, oxygen from the air combines with the iron to make iron oxide or rust. So the first part of the answer is that the weight of the bar increases, due to the increased weight of oxygen which has combined with the iron