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BVP Medical BVP Medical Solved Paper-2015

  • question_answer
    The composition of a sample of wustite is \[B\xrightarrow{\begin{smallmatrix}  Excess\,of \\  alc.\,KOH \end{smallmatrix}}C\] What percentage of iron is present in the form of Fe(III)?

    A)  75%                      

    B)  45%,  

    C)  15%                      

    D)  35%

    Correct Answer: C

    Solution :

                    Oxidation number of Fe in wustite \[138\text{ }cal/deg\] It is an intermediate value in between two oxidation states of Fe, Fe(II) and Fe (III). Suppose the percentage of Fe (III) be x, then                 \[13.75\text{ }cal/deg\]                 \[18.28eu\] or                            \[23.41\text{ }eu\] Hence, wustite is the mixture of 15% Fe(III) and 85% Fe(II).


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