Question

Iron nai dipped in a solution kept in a test tubevafter half an hour it was observered that the coloured solution waschanged namevthe teo metal that the colured solution

Answer 1

The above reaction is a displacement reaction where iron (a more reactive metal) displaces copper (a low reactive metal) from its solution. The color change happens from blue to green, as CuSO4 is displaced by iron to form FeSO4.
A reddish brown coating will be observed on iron nail which is copper.
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