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JEE Main & Advanced JEE Main Paper (Held On 12 May 2012)

  • question_answer
    \[\alpha ,v\]and u represent most probable velocity, average velocity and root mean square velocity respectively of a gas at a particular temperature. The correct order among the following is     JEE Main Online Paper (Held On 12 May 2012)

    A) \[u>v>\alpha \]               

    B)                        \[v>u>\alpha \]

    C)                        \[\alpha >u>v\]               

    D)                        \[u>\alpha >v\]

    Correct Answer: A

    Solution :

                    \[u:v:\alpha =\sqrt{\frac{3RT}{M}}:\sqrt{\frac{8RT}{\pi M}}:\sqrt{\frac{2RT}{M}}\] \[=\sqrt{3}:\sqrt{\frac{8}{\pi }}:\sqrt{2}\]\[=1.224:1.128:1\]


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