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JEE Main & Advanced AIEEE Solved Paper-2013

  • question_answer
    Experimentally it was found that a metal oxide has formula\[{{M}_{0}}{{.}_{98}}O.\]Metal M, is present as\[{{M}^{2+}}\]and\[{{M}^{3+}}\]in its oxide. Fraction of the metal which exists as\[{{M}^{3+}}\]would be:     AIEEE Solevd Paper-2013

    A) 7.01 %  

    B)        4.08 %  

    C)                        6.05 %  

    D)        5.08 %

    Correct Answer: B

    Solution :

    \[3x+2(0.98-x)=2\] \[x+1.96=2\] \[x=0.04\] % of \[{{M}^{+3}}=\frac{0.04}{0.98}\times 100=4.08%\]


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