Question

Equation of blue copper solution and later iron rusted and solution becomes green reason

Answer 1

Answer:

Fe     +   CuSO4   ------->        Cu    +     FeSO4

Iron     Copper sulphate    Copper      Iron sulphate

The highly reactive iron displaces copper from the copper sulphate solution.  Therefore you can observe that after few minutes when an iron nail is dipped in the copper sulphate solution,  the copper particles are placed on the iron nail and the copper sulphate solution(blue) changes to iron sulphate solution(green).

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