1.

    The root mean square speed of hydrogen molecules at room temperature is 2400ms12400\,\,{\rm{m}}{{\rm{s}}^{ - 1}}. At room temperature the root mean square speed of oxygen molecules would be:

    A

    400ms1400\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    B

    300ms1300\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    C

    600ms1600\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    D

    1600ms11600\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

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    2.

    For one mole of an ideal gas, increasing the temperature from 10C10^\circ C to 20\,\,^\circ C

    A

    Increases the average kinetic energy by two times

    B

    Increases the rms velocity by 2\sqrt 2 times

    C

    Increases the rms velocity by two times

    D

    Increases both the average kinetic energy and rms velocity, but not significantly

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    8.

    The root mean square speed of hydrogen molecules at room temperature is 2400ms12400\,\,{\rm{m}}{{\rm{s}}^{ - 1}}. At room temperature the root mean square speed of oxygen molecules would be:

    A

    400ms1400\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    B

    300ms1300\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    C

    600ms1600\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    D

    1600ms11600\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

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