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JCECE Engineering JCECE Engineering Solved Paper-2005

  • question_answer
    If \[P\] is the pressure, \[V\] the volume, \[R\] the gas constant, \[k\] the Boltzmann constant and \[T\] the absolute temperature, then the number of molecules in the given mass of the gas is given by:

    A) \[\frac{PV}{RT}\]                                             

    B) \[\frac{PV}{kT}\]

    C) \[\frac{PR}{T}\]                                

    D)  \[PV\]

    Correct Answer: B

    Solution :

    From ideal gas equation                \[PV=nkT\]where \[k\] is Boltzmann's constant, \[P\] is pressure, \[V\] is volume and \[T\] is absolute temperature. Hence, number of molecules in given mass of gas                 \[n=\frac{PV}{kT}\]


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