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WB JEE Medical WB JEE Medical Solved Paper-2010

  • question_answer
    When a manganous salt is fused with a mixture of \[KN{{O}_{3}}\]and solid \[\text{NaOH,}\] the oxidation number of Mn changes from +2 to

    A)  +4                                         

    B)  +3   

    C)  +6                                         

    D)  +7

    Correct Answer: C

    Solution :

                     \[\overset{(+2)}{\mathop{M{{n}^{+2}}}}\,+NO_{3}^{-}+O{{H}^{-}}\xrightarrow{{}}\overset{(+6)}{\mathop{MnO_{4}^{-2}}}\,+{{H}_{2}}O\]


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