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RAJASTHAN ­ PET Rajasthan PET Solved Paper-2008

  • question_answer
    The value of standard reduction potentials of three metallic cations   X, Y and Z are + 0.52, \[-3.03\]and\[-1.18\]volt respectively. The order of reducing power of these metal will

    A)  \[Y>Z>X\]        

    B)  \[X>Y>Z\]

    C)  \[X>Z>Y\]        

    D)  \[Z>X>Y\]

    Correct Answer: A

    Solution :

     The reducing power of metals increases with the increasing the tendency to give the electron. The substances which have lower reduction potentials are stronger reducing agents, ie, they can given the electron very easily. Hence, the order of reducing power of metals is \[\underset{(-3.03)}{\mathop{Y}}\,~>\underset{(-1.18)}{\mathop{Z}}\,~>\underset{(+0.52)}{\mathop{X}}\,\]


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