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JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank Electrode potential Ecell Nernst equation and ECS

  • question_answer
    The reaction is spontaneous if the cell potential is [MP PET 1999]

    A)                 Positive               

    B)                 Negative

    C)                 Zero      

    D)                 Infinite

    Correct Answer: A

    Solution :

               EMF = [s.r.p. of cathode?s.r.p of anode]            Where s.r.p. = Standard reduction potential\[\]            If EMF is positive then the reaction is spontaneous            For e.g. in Galvanic cell             EMF = 1.1 volt             Cathode is made of copper             Anode is made of Zinc                                 EMF = 0.34 ?(? 0.76) = 1.1 volt.


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