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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2007

  • question_answer
    A gas is found to have a formula \[{{[CO]}_{x}}\]. Its vapour density is 70, the \[x\] is

    A)  3.0            

    B)  3.5

    C)  5.0            

    D)  6.5

    Correct Answer: C

    Solution :

    Given vapour density = 70 \[\therefore \] molecular weight \[=2\times \] vapour density                 \[=2\times 70=140\]                 \[{{[CO]}_{x}}={{(12+16)}_{x}}={{(28)}_{x}}\] \[\therefore \] \[{{(28)}_{x}}=140\]                 \[x=\frac{140}{28}=5\] \[\therefore \] formula is \[{{(CO)}_{5}}\]


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