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JEE Main & Advanced AIEEE Solved Paper-2002

  • question_answer
    For a cell given below \[Ag\,\left| A{{g}^{+}} \right|\left| C{{u}^{2+}} \right|\,\,Cu\]                                                                                                    -                    + \[A{{g}^{+}}+{{e}^{-}}\xrightarrow{{}}Ag,\,{{E}^{o}}=x\] \[C{{u}^{2+}}2\,{{e}^{-}}\xrightarrow{{}}Cu,\,{{E}^{o}}=y\] \[{{E}^{o}}_{cell}\] is   AIEEE  Solved  Paper-2002

    A) \[x+2y\]       

    B)                           \[2x+y\] 

    C)           \[y-x\]                     

    D)           \[y-2x\]

    Correct Answer: C

    Solution :

    At LHS (oxidation) \[2\times (Ag\xrightarrow{{}}A{{g}^{+}}+{{e}^{-}})\]\[E_{ox}^{o}=-x\] At RHS (reduction) \[C{{u}^{2+}}2{{e}^{-}}\xrightarrow{{}}Cu\]                                                                                 \[E_{red}^{o}=+y\] \[2Ag+C{{u}^{2+}}\xrightarrow{{}}Cu+2A{{g}^{+}},E_{red}^{o}=(y-x)\] NOTE \[{{E}^{o}}\] values remain constant when half-cell equation is multipled/divided.


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