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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    For decolourisation of 1 mole of \[KMn{{O}_{4}}\], the moles of \[{{H}_{2}}{{O}_{2}}\] required is:

    A) 1/2                               

    B) 3/2    

    C) 5/2                               

    D) 7/2

    Correct Answer: C

    Solution :

    [c] J When \[KMn{{O}_{4}}\]reacts with\[{{H}_{2}}{{O}_{2}}\] the reaction is: in presence of \[{{H}_{2}}S{{O}_{4}}\] \[2KMn\,{{O}_{4}}+5{{H}_{2}}{{O}_{2}}+3{{H}_{2}}S{{O}_{4}}\] \[\to {{K}_{2}}S\,{{O}_{4}}+2MnS{{O}_{4}}+8{{H}_{2}}S{{O}_{4}}\] Since 2 moles of \[MnS{{O}_{4}}\] requires = 5 moles of \[{{H}_{2}}{{O}_{2}}\] 1 mole require moles of \[{{H}_{2}}{{O}_{2}}\] or = 2.5 moles


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