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Question:
The rms speeds of the molecules of Hydrogen, Oxygen and Carbondioxide at the same temperature are $\mathrm{V}_{\mathrm{H}}, \mathrm{V}_{\mathrm{O}}$ and $\mathrm{V}_{\mathrm{C}}$ respectively then :
Correct Option: 1
Solution:
$\mathrm{V}_{\mathrm{RMS}}=\sqrt{\frac{3 \mathrm{RT}}{\mathrm{M}_{\mathrm{W}}}}$
At the same temperature $\mathrm{V}_{\mathrm{RMS}} \propto \frac{1}{\sqrt{\mathrm{M}_{\mathrm{w}}}}$
$\Rightarrow \mathrm{V}_{\mathrm{H}}>\mathrm{V}_{\mathrm{O}}>\mathrm{V}_{\mathrm{C}}$
Option (1)
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