Take some clean Iron nails and leave them in the open for a few days observe what happens to them is it a reversible or an Irreversible changes also are the changes in the iron Iron nails d e s i r a b l e or undesirable
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Explanation:
they will rust and its an irreversible change ......and a undesirable change
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The iron nails on leaving few days in open results in the formation of reddish brown layer on its surface that is Rust and it is undesirable and irreversible change.
Explanation:
Corrosion
The eating away of metal article is called corrosion .
The corrosion in case of iron is called Rusting .
Condition necessary for rusting :
- Moisture
- Air
When iron comes in contact with moist air the reddish brown layer is formed on its surface that is Rust .
The reaction for the same is given :
Fe + O₂----> Fe₂O₃.xH₂O
(moist)
It makes iron articles brittle with time .
Prevention :
It can be done by painting ,galvanization ,chromium or copper plating etc
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