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NEET Sample Paper NEET Sample Test Paper-52

  • question_answer
    The standard reduction potentials for \[Z{{n}^{2+}}/Zn,\,\,N{{i}^{2+}}/Ni,\,\,and\,\,F{{e}^{2+}}/Fe\] are -0.76, -0.23 and -0.44 V respectively. The reaction \[X+{{Y}^{2+}}\to {{X}^{2+}}+Y\] will be spontaneous when-

    A) \[X=Ni,Y=Zn\]

    B) \[X=Fe,Y=Zn\]

    C) \[X=Zn,Y=Ni\]

    D) \[X=Ni,Y=Fe\]

    Correct Answer: C

    Solution :

    \[Zn+N{{i}^{+2}}\to \,\,Z{{n}^{+2}}\,\,+\,\,Ni\]


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