Which substance is serving as a reducing agent in the following reaction

14H++Cr2O72+3Ni2Cr3++7H2O+3Ni2+

  1. A

    H2O

  2. B

    Ni

  3. C

    H+

  4. D

    Cr2O72

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    Solution:

    The oxidation number of Ni changes from 0 to +2 .

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