CBSE Class 10 Science
Question 26 of 28
Chemical Reactions and Equations — Question 1
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Question Question 1
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
When an iron nail is dipped in a copper sulphate solution, iron being on top of copper in the metal reactivity series displaces copper from copper sulphate solution and forms iron sulphate, which is green in colour.
Fe (s) + CuSO4 (aq) ⟶ FeSO4 (aq) + Cu (s)
Hence, the colour of copper sulphate solution changes when an iron nail is dipped in it.