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NEET Chemistry Hydrogen & Its Compounds / हाइड्रोजन और इसके यौगिक Question Bank Self Evaluation Test - Hydrogen

  • question_answer
    100 mL of 0.01 \[M\,KMn{{O}_{4}}\] oxidises 100 mL \[{{H}_{2}}{{O}_{2}}\] in acidic medium. Volume of the same\[KMn{{O}_{4}}\] required in alkaline medium to oxidise 100 mL of the same \[{{H}_{2}}{{O}_{2}}\] will be (\[MnO_{4}^{-}\] changes to \[M{{n}^{2+}}\] in acidic medium and to \[Mn{{O}_{2}}\] in alkaline medium) 

    A) \[\frac{100}{3}mL\]                  

    B) \[\frac{500}{3}mL\]

    C) \[\frac{300}{5}mL\]                  

    D) None

    Correct Answer: B

    Solution :

    [b] \[Mn{{O}_{4}}^{-}+5{{e}^{-}}\to M{{n}^{2+}}\]       (acidic) \[Mn{{O}_{4}}^{-}+3{{e}^{-}}\to Mn{{O}_{2}}\]      (basic) \[100\,mL\,{{H}_{2}}{{O}_{2}}\equiv 100\times 5N\] \[Mn{{O}_{4}}^{-}\equiv V\times 3N\,Mn{{O}_{2}}\] \[N=\frac{500}{3}mL\]


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