Question

What happens when iron nail is exposed to moisture ?

Answer 1

When iron nail is exposed to the moisture it reacts with water and air present in moisture and form rusting .

Answer 2

The corrosion of iron with moist air is known as rusting.

When an iron object is exposed to air in the presence of moisture, it gets corroded and reddish brown flaky substance, which is known as rust, is formed. Rust is hydrated iron (III) oxide FE2O3. xH2O. Unlike the oxide layers of other metals such as aluminium and chromium, rust does not stick to the surface and does not protect the metal from further corrosion. Rust once formed, causes more and more rusting until the whole of the metal is eaten up. Thus, rusting weakens the structures that are made up of iron.

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