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BVP Medical BVP Medical Solved Paper-2014

  • question_answer
    Ceric ammonium sulphate and potassium permanganate are used as oxidising agents in acidic medium for oxidation of ferrous ammonium sulphate to ferric-sulphate. The ratio of number of moles of eerie ammonium sulphate required per mole of ferrous ammonium sulphate to the number of potassium permanganate required per mole of ferrous ammonium sulphate, is

    A)  \[-20.6\]                             

    B)  \[8.8\text{ }kJ\]              

    C)  \[BaC{{l}_{2}}(s)+2{{H}_{2}}O\xrightarrow{{}}BaC{{l}_{2}}.2{{H}_{2}}O(s),\]                        

    D)  \[29.4kJ\]

    Correct Answer: A

    Solution :

                    \[F{{e}^{2+}}+C{{e}^{4+}}\xrightarrow{{}}F{{e}^{2+}}+C{{e}^{3+}}\] \[5F{{e}^{2+}}+MnO_{4}^{-}+8{{H}^{+}}\xrightarrow{{}}5F{{e}^{3+}}+M{{n}^{2+}}\]                                                                 \[+4{{H}_{2}}O\] \[\therefore \] \[\frac{Moles\,of\,ceric\,ammouium\,sulphate}{Moles\,of\,potassium\,permangnate}\]\[=\frac{1}{1/5}=5.0\]


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