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$2$
- ✓$\frac{1}{4}$
- C$4$
- D$16$
✓
Answer
Correct option: B.
$\frac{1}{4}$
$\frac{\text{C}_{\text{oxy}}}{\text{C}_{\text{H}}}=\sqrt{\frac{\text{m}_{\text{H}}}{\text{m}_{\text{oxy}}}}=\sqrt{\frac{1}{16}}=\frac{1}{4}$
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