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

  • question_answer
    The standard reduction potential for \[L{{i}^{+}}/Li\,;\,\,Z{{n}^{2+}}/Zn\,;\] \[{{H}^{+}}/{{H}_{2}}\] and \[A{{g}^{+}}/Ag\] is \[-3.05,\,\,-0.762,\,\,0.00\] and \[+0.80\,\,V.\] Which of the following has highest reducing capacity                                                [MP PMT 1992]

    A)                 \[Ag\]  

    B)                 \[{{H}_{2}}\]

    C)                 \[Zn\]   

    D)                 \[Li\]

    Correct Answer: D

    Solution :

                    \[{{E}^{o}}=-3.05\,L{{i}^{+}}/Li\] is most negative (minimum) and hence \[Li\] has maximum tendency to lose  electrons or it is the strongest reducing agent.


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