KVPY Sample Paper KVPY Stream-SX Model Paper-4

  • question_answer
    Electrode potential for Mg electrode varies according to the equation

    A)

    B)

    C)

    D)

    Correct Answer: B

    Solution :

    [b] \[{{E}_{M{{g}^{2+}}/Mg}}=E{{{}^\circ }_{M{{g}^{2+}}/Mg}}-\frac{0.059}{2}\log \frac{1}{M{{g}^{2+}}}\] or  \[{{E}_{M{{g}^{2+}}/Mg}}=E{{{}^\circ }_{M{{g}^{2+}}/Mg}}+\frac{0.059}{2}\log \,M{{g}^{2+}}\] The given equation is of \[y=mx+c\]type, which is equation of straight line. So, graph of \[{{E}_{M{{g}^{2+}}|Mg}}(y)\,vs\,\log \,[M{{g}^{2+}}](x)\] is a straight line with slope \[\frac{0.059}{2}\]and intercept \[E{{{}^\circ }_{M{{g}^{2+}}|Mg}}.\]


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