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AMU Medical AMU Solved Paper-2014

  • question_answer
    What is the oxidation number of vanadium in\[R{{b}_{4}}Na[H{{V}_{10}}{{O}_{28}}]\]?

    A)  +8                         

    B)  +5     

    C)  +3                         

    D)  +1

    Correct Answer: B

    Solution :

                    \[R{{b}_{4}}Na[H{{V}_{10}}{{O}_{28}}]\] Let oxidation number of V is x. \[\therefore \]  \[4\times 1+1+[+1+10x+28(-2)]=0\] or                            \[4+1+1+10x-56=0\] or                                            \[x=+5\] 


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