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CMC Medical CMC-Medical Ludhiana Solved Paper-2013

  • question_answer
    Which of the following can be oxidized further with a strong oxidising agent? \[\underset{I}{\mathop{S{{O}_{2}}}}\,\]               \[\underset{II}{\mathop{Mn{{O}_{2}}}}\,\]                \[\underset{III}{\mathop{A{{l}_{2}}{{O}_{3}}}}\,\]           \[\underset{IV}{\mathop{Cr{{O}_{3}}}}\,\]

    A)  I and II                

    B)  II and IV

    C)  III and IV                            

    D)  I and IV

    Correct Answer: A

    Solution :

                    \[S{{O}_{2}}\] can be oxidised to\[S{{O}_{3}}\]. \[Mn{{O}_{2}}\]can be oxidised to either \[MnO_{4}^{2-}\] or \[MnO_{4}^{-}\]. In\[A{{l}_{2}}{{O}_{3}}\] and \[Cr{{O}_{3}},\] \[Al\] and \[Cr\]are already in their highest oxidation states. So, cant be oxidized further.


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