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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    Direct current is passed through copper sulphate solution using platinum electrodes. The elements liberated at the electrodes are

    A)  copper at anode and sulphate at cathode

    B)  sulphur at anode and copper at cathode

    C)  oxygen at anode and copper at cathode  

    D)  copper at anode and oxygen at cathode

    Correct Answer: C

    Solution :

     Platinum electrodes are non-attackable. So, the disulphate ion at the anode cannot react with it. \[O{{H}^{-}}\] ion in the acqueous medium liberation\[{{O}_{2}}\]. \[S{{O}_{4}}^{--}\]reacts with\[{{H}^{+}}\]to form\[{{H}_{2}}S{{O}_{4}}\].


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