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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2009

  • question_answer
        A 2.5 mol sample of hydrazine,\[{{N}_{2}}{{H}_{4}}\]loses 25 mole of electrons in being converted to a new compound\[X\]. Assuming that all of the nitrogen appears in the new compound, what is the oxidation state of nitrogen in compound\[X\]?

    A)  \[-1\]                                   

    B)  \[-2\]

    C)  \[+3\]                                  

    D)  \[+4\]

    Correct Answer: C

    Solution :

                    Oxidation number of N in\[{{N}_{2}}{{H}_{4}},-2\] Number of electrons lost by each N atom                                 \[=\frac{25}{2\times 2.5}=5\] Then,                    \[x-(-2)=5\] or                            \[x=+3\]


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