The rms speed of oxygen at room temperature is about 500m/s. The rms speed of hydrogen at the same temperature is about
A
125m/s
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B
2000m/s
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C
8000m/s
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D
31m/s
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Solution
The correct option is B2000m/s Given, Vrms(O2)=500m/s
We know that, Vrms=√3RTM ⇒Vrms∝1√M
[Temperature is same ]
So, Vrms,H2Vrms,O2=√MO2√MH2=√32√2 ⇒Vrms,H2500=√16⇒Vrms,H2=2000m/s