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NEET Sample Paper NEET Sample Test Paper-8

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

    A)  \[300m/s\]                  

    B)  \[150m/s\]

    C)  \[600m/s\]                  

    D)  \[75m/s\]

    Correct Answer: B

    Solution :

    As,       \[{{V}_{rms}}=\sqrt{\frac{3RT}{m}}\] or  \[300=\sqrt{\frac{3RT}{m}}\]  ?.(i) and      \[{{V}_{rms}}=\sqrt{\frac{3R(T)(2)}{2m}}\]                             ?..(ii)  \[{{V}_{rms}}\] solving  equations (i) and (ii) we get             \[=\frac{1}{2}\times 300=150m/s\]


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