NEET Sample Paper NEET Sample Test Paper-1

  • question_answer 81) Con side the following redox reaction\[VO_{3}^{2-}+MnO_{4}^{-}\xrightarrow{{}}M{{n}^{2+}}+VO_{4}^{3-}\]1 mole of \[VO_{3}^{2-}\] is oxidised by x mole of \[MnO_{4}^{-}\]. Thus, x is

    A)  \[0.2\]         

    B)  \[0.4\]

    C)  \[0.8\]                         

    D)  \[1.0\]

    Correct Answer: A

    Solution :

       \[\underset{+4}{\mathop{VO_{3}^{2-}}}\,\xrightarrow{{}}\underset{+5}{\mathop{VO_{4}^{3-}}}\,\]      \[\underset{1\,unit}{\mathop{Change}}\,\] \[\underset{+7}{\mathop{MnO_{4}^{-}}}\,\xrightarrow{{}}{{\underset{+2}{\mathop{Mn}}\,}^{2+}}\]   5 unit \[\therefore \]  \[5VO_{3}^{2-}\equiv 1MnO_{4}^{-}\]                 \[1VO_{3}^{2-}\equiv \frac{1}{5}MnO_{4}^{-}=0.2\]            

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