Question

Why do iron object turn reddish brown when exposed to moist air​

Answer 1

When an iron object is left in damp air for a considerable time, it gets covered with a reddish- brown flaky substance called rust. This is called rusting of iron. The process of rusting is represented as follows: Rusting of iron is a chemical change because a new substance iron oxide is formed.....

Answer 2

because it start rusting.