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NEET Sample Paper NEET Sample Test Paper-64

  • question_answer
    On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

    A) Na                               

    B) \[{{H}_{2}}\]

    C) \[S{{O}_{2}}\]             

    D) \[S{{O}_{3}}\]

    Correct Answer: B

    Solution :

    Water is reduced at the cathode and oxidized at the anode instead of \[N{{a}^{+}}\,\,and\,\,SO{{_{4}^{2-}}^{~}}.\] \[Cathode:\,\,2{{H}_{2}}O+2{{e}^{-}}\,\,\to \,\,{{H}_{2}}+2O{{H}^{-}}\] \[Anode:\,\,{{H}_{2}}O\,\,\to \,\,2{{H}^{+}}\,\,+\frac{1}{2}\,\,{{O}_{2}},\,\,+\,\,2{{e}^{-}}~\]


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