Question

what happens when an iron nail is exposed to humid atmosphere? (2 marks question)

Answer 1

when an iron nail is exposed to humid atmosphere it get in contact with the water. so the chemical reaction take place and it's starts rusting . due to rust it starts damaging is not in use afterwards. and it is also harmful to our skin.

Answer 2

When an iron nail is exposed to moist air ,it reacts with the moisture and oxygen present in the atmosphere and a reddish brown substance is formed on its surface.This reddish brown substance is flaky and is called rust.When rust is formed,the metal reduces and furrows and holes are formed on its surface as though the metal has been eaten away.

The chemical formula of rust is Fe O .nH O.
2 3 2
Rust destroys the materials made of iron like parts of machinery,building structures and household items.

Hope this helps!☺