Question

what happen when iron nail is dipped in copper sulohate solution

Answer 1

Here is your answer

When iron nail is dipped in copper sulphate solution then iron displaces copper to form it's solution because iron is more reactive metal than copper.

Fe+CuSO4=FeSO4+Cu

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Answer 2

When iron nailis dipped in copper sulphate solution, then the solution becomes green in colour due to the ferrous sulphate solution.