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AIIMS AIIMS Solved Paper-2007

  • question_answer
    The density of air is 0.001293 g/cc at STP. Its vapour density is

    A)  \[0.001293\]     

    B)         \[8.2786\]          

    C)         \[14.49\]            

    D)         \[6.2706\]

    Correct Answer: C

    Solution :

    Density \[=0.001293\text{ }g/cc\] or \[1.293\text{ }g/L\] Molecular mass \[=\frac{RTd}{P}\] \[=\frac{0.0821\times 273\times 1.293}{1}\] \[=28.98g/mol\] Molecular mass =  \[2\times \] vapour density             \[VD=\frac{28.98}{2}=14.49\]  


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