JEE Main & Advanced Sample Paper JEE Main Sample Paper-32

  • question_answer
    The vander Waals' constant 'a' for the gases\[C{{H}_{4}},{{N}_{2}},N{{H}_{2}}\], and \[{{O}_{2}}\] are \[2.25,1.39,4.17\]and at  \[1.3\text{ }{{L}^{2}}\] atai- \[mo{{l}^{-2}}\] respectively. The gas which shows highest critical temperature is:

    A) \[C{{H}_{4}}\]

    B)                    \[{{N}_{2}}\]

    C) \[N{{H}_{3}}\]

    D)                    \[{{O}_{2}}\]

    Correct Answer: C

    Solution :

    The gas which shows higher value of'a5 will have higher value of critical temperature as vander Walls' constant 'a' is directly proportional to critical temperature i.e.,             \[{{T}_{c}}=\frac{8a}{27Rb}\]

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