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Physical and Chemical Changes
Explain why rusting of iron objects is faster in coastal areas than in deserts.
Rusting is the process of formation of a brown layer on iron substances when exposed to moist air (which contains oxygen and water). This brown layer on the surface of an iron object is a hydrated iron oxide or rust. It is a chemical and irreversible change.
The two essential conditions for rusting of iron objects are water (moisture) and oxygen. In coastal areas, the water content in the air is higher as compared to deserts. So, the rusting process is faster in coastal areas than in deserts.
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