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NEET Sample Paper NEET Sample Test Paper-67

  • question_answer
    The number of moles of \[KMn{{O}_{4}}\] that will be needed to react with one mole of sulphite ion in acidic solution is:

    A) \[4/5\]   

    B) \[3/5\]

    C) 1                                 

    D) \[2/5\]

    Correct Answer: D

    Solution :

    The balance chemical equation is: \[2MnO_{4}^{-}+6{{H}^{+}}\,\,+\,\,\,5SO_{3}^{-\,-}\,\xrightarrow{{}}\] \[2M{{n}^{++}}+\,\,5SO{{_{4}^{-}}^{-}}+\,\,3{{H}_{2}}O\] From the equation it is clear that Moles of \[MnO_{4}^{-}\] required to oxidise 5 moles of \[SO_{^{3}}^{-\,-}\] are 2 Moles of \[MnO_{4}^{-}\] required to oxidise 1 mole of \[SO_{3}^{-\,-}\] are \[2/5\].


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