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JEE Main & Advanced Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ Question Bank Critical Thinking

  • question_answer
    One mole of \[{{N}_{2}}{{H}_{4}}\] loses 10 mol of electrons to form a new compound Y. Assuming that all nitrogen appear in the new compound, what is the oxidation state of \[{{N}_{2}}\]in Y ? (There is no change in the oxidation state of hydrogen) [IIT 1981; Pb. PMT 1998]

    A) + 3         

    B) - 3

    C) - 1         

    D) + 5

    Correct Answer: A

    Solution :

    \[N_{2}^{2-}\to {{\,}_{2}}{{N}^{a+}}+10{{e}^{-}}\]            \ \[2a-[2\times (-2)]=10\]                                 \ \[a=+3\].


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