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NEET Sample Paper NEET Sample Test Paper-82

  • question_answer
    The root mean square velocity of the gas is 300 m/s. What will be the root mean square speed of the molecules, if the atomic weight is double and absolute temperature is halved?

    A)  150 m/s                       

    B)  75 m/s

    C)  600 m/s                       

    D)  300 m/s

    Correct Answer: A

    Solution :

    As, \[{{v}_{rms}}=\sqrt{\frac{3RT}{M}}\,\,\,\Rightarrow \,\,300=\sqrt{\frac{3RT}{M}}\]    ... (i) and \[v{{'}_{rms}}=\sqrt{\frac{3R(T/2)}{2M}}\]                          ? (ii) On solving \[\operatorname{v}{{'}_{rms}} =\,\,150m/s\]


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