Question

what do you observe when an iron rod is kept in a water tank ? With explanation.​

Answer 1

After some days I'll observe that its get rust, means the corrison of iron will take place,

that is a physical change

Answer 2

Explanation:

When an iron rod is kept in a water tank --

It slowly gets rusted and gets corroded to form rust powders which is brownish red in colour.

Hope it helps ( :