CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2011

  • question_answer
    The rms velocity of hydrogen is \[\sqrt{7}\] times the rms velocity of nitrogen. If T is the temperature of the gas, which of the following is true?

    A)  \[{{T}_{{{H}_{2}}}}=\sqrt{7}\,{{T}_{{{N}_{2}}}}\]               

    B)  \[{{T}_{{{N}_{2}}}}=\,{{T}_{{{H}_{2}}}}\]

    C)  \[{{T}_{{{N}_{2}}}}=\sqrt{7}{{T}_{{{H}_{2}}}}\] 

    D)  \[{{T}_{{{N}_{2}}}}=2{{T}_{{{H}_{2}}}}\]

    Correct Answer: D

    Solution :

                    \[\frac{{{C}_{{{H}_{2}}}}}{{{C}_{{{N}_{2}}}}}=\sqrt{7}=\sqrt{\frac{{{T}_{{{H}_{2}}}}\times 28}{2\times {{T}_{{{N}_{2}}}}}}\]                 \[7=\frac{14{{T}_{{{H}_{2}}}}}{{{T}_{{{N}_{2}}}}}\] or            \[{{T}_{{{N}_{2}}}}=2\,{{T}_{{{H}_{2}}}}\]


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