11th Class Chemistry Redox Reactions Question Bank 11th CBSE Chemistry Redox Reactions

  • question_answer The blue colour of copper sulphate solution is discharged when a rod of zinc is dipped in it. Explain.


                    Zinc lies below copper in the electrochemical series and can therefore, release electrons to the \[C{{u}^{2+}}\] ions. As a result, Zn is oxidised while \[C{{u}^{2+}}\] ions are reduced. Since the concentration of \[C{{u}^{2+}}\] ions in the solution decreases, the blue colour of the solution is slowly discharged. \[Zn(s)+C{{u}^{2+}}(aq)\xrightarrow{\,}Z{{n}^{2+}}(aq)+Cu(s)\]

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