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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 35

  • question_answer
    Total charge required for the oxidation of two moles \[M{{n}_{3}}{{O}_{4}}\] into \[MnO_{4}^{-2}\] in presence of alkaline medium is:

    A) 5 F                   

    B)        10 F

    C) 20 F           

    D)        None of these

    Correct Answer: C

    Solution :

    [c] 1 mole \[M{{n}_{3}}{{O}_{4}}\,lose\text{ }\left( 6-\frac{8}{3} \right)\times 3=10\text{ }mole\text{ }{{e}^{-}}\]; so total charge required \[=2\times 10=20\text{ }F\]  


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