Question

happens when iron nail is dipped in a copper sulphate solution​

Answer 1

When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO4) there takes reaction between them and coppersulphate change its color from blue to light green. This shows Iron is more reactive than Copper, it can replace Copper from CuSO4. CuSO4 is in blue Color and FeSO4 is in light green color.

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Answer 2

Your answer is there in the attachment

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