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Kinetic Theory — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsKinetic Theory1 Mark
MCQ
Oxygen and hydrogen gases are at same temperature and pressure. And the oxygen molecule has 16 times the mass of hydrogen molecule. Then the ratio of their r.m.s. speed is:
  • A
    2
  • B
    $\frac{1}{4}$
  • C
    4
  • D
    16
✓

Answer

  1. $\frac{1}{4}$

Explanation:

$\frac{\text{C}_{\text{oxy}}}{\text{C}_{\text{H}}}=\sqrt{\frac{\text{m}_{\text{H}}}{\text{m}_{\text{oxy}}}}=\sqrt{\frac{1}{16}}=\frac{1}{4}$

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