take some clean iron nail and leave them in a open for a few days observed what happened to them is it reversible or Irreversible changes also the changes in the iron nail desirable or undesirable
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Explanation:
the changes happened to the iron nail is that it got oxdisied in presence of moisture. hence it got rusted . the change is irreversible because it has losed its properties. and the changes are undesirable cause its had lost its potential
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