how do you know that resting of iron is a change
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For Example, when the iron is exposed to air and moisture, rust formation takes place. Rust is nothing but Iron Oxide; a new substance formed out of the reaction. The colour of the surface of the iron also changes. Hence, rusting of iron is a chemical change.
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Answer:When an iron object is left in damp air for a considerable time, it gets covered with a reddishbrown flaky substance called rust. This is called rusting of iron.
Explanation:Rusting of iron is a chemical change because a new substance iron oxide is formed. The presence of oxygen and water or water vapour is essential for rusting. Rusting of iron is a continuous process which slowly eats up the iron objects and makes them useless.
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