Question
Zn rod is immersed in $\mathrm{CuSO}_4$ solution. What will you observe after an hour? Explain your observation in terms of redox reaction.
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Answer
The blue colour of $\mathrm{CuSO}_4$ solution will get discharged and reddish brown copper metal will be deposited on Zn rod. This is because blue colour $\mathrm{Cu}_2+$ (in $\mathrm{CuSO}_4$ ) gets reduced to Cu by accepting two electrons from Zn , which gets oxidised to colourless $\mathrm{ZnSO}_4$.
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