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CMC Medical CMC-Medical VELLORE Solved Paper-2010

  • question_answer
    10 g of \[{{O}_{2}}\]were introduced into an evacuated vessel of 5 L capacity maintained at\[27{}^\circ C\]. What is the pressure of the gas in atmospheres in the container?

    A)  2.02 atm             

    B)  1.54 atm

    C)  1.02 atm             

    D)  5.24 atm

    E)  None of these

    Correct Answer: B

    Solution :

                    Since, the volume of the gas is equal to the volume of its container, therefore \[V=5L\] Further, molecular mass of\[{{O}_{2}}=32.0\] therefore, the number of moles of \[{{O}_{2}}\]gas, \[n=\frac{10}{32}mol\] and using the ideal gas equation, \[pV=nRT\] \[p=\frac{nRT}{V}=\frac{(10/32)\,(0.0821)\,(300)}{5}\] \[=1.54\,atm\]


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