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Question
What do you observe when Iron nail is kept in copper sulphate solution for sometime.
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Solution
When an iron nail is kept in copper sulphate solution, a reddish brown coating is seen on the iron nail after sometime. Also, the colour of the copper sulphate solution changes from blue to green. This is observed because iron displaces copper from copper sulphate solution as iron is more reactive than copper.
Fe (s) + CuSO4 (aq) → FeSO4 (aq) + Cu (s)
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