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VMMC VMMC Medical Solved Paper-2013

  • question_answer
    A certain metal sulphide, \[M{{s}_{2}}\]is used extensively as a high temperature lubricant. If \[M{{s}_{2}}\]is 40.06% by mass  sulphur, metal M has atomic mass

    A)  160u  

    B)  40 u   

    C)  64 u    

    D)  96 u

    Correct Answer: D

    Solution :

     \[\underset{100}{\mathop{\underset{M+64}{\mathop{M{{S}_{2}}}}\,}}\,\equiv \underset{\begin{smallmatrix}  64 \\  40.06 \end{smallmatrix}}{\mathop{2S}}\,\] \[\frac{M+64}{100}=\frac{60}{40.06}\] \[M=96\]


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