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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-20

  • question_answer
    Oxidation number of Chromium in \[{{\text{K}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\]would be

    A)  \[+6\]              

    B)  \[-\,\,6\]

    C)  \[+\,3.5\]         

    D)  \[-\,2\]

    Correct Answer: A

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