A mixture of 2 moles of helium gas (atomic mass = 4 u), and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their ‘rms’ speeds \(\left[ {\frac{{{V_{{\rm{rms}}}}\left( {{\rm{helium}}} \right)}}{{{{\rm{V}}_{{\rm{rms}}}}\left( {{\rm{argon}}} \right)}}} \right],\) is close to:

A mixture of 2 moles of helium gas (atomic mass = 4 u), and 1 mole of

1.	A mixture of 2 moles of helium gas (atomic mass = 4 u), and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their ‘rms’ speeds \(\left[ {\frac{{{V_{{\rm{rms}}}}\left( {{\rm{helium}}} \right)}}{{{{\rm{V}}_{{\rm{rms}}}}\left( {{\rm{argon}}} \right)}}} \right],\) is close to:
A.	3.16
B.	0.32
C.	0.45
D.	2.24
Answer» B. 0.32

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A mixture of 2 moles of helium gas (atomic mass = 4 u), and 1 mole of argon gas (atomic mass = 40 u) is kept at 300 K in a container. The ratio of their ‘rms’ speeds \(\left[ {\frac{{{V_{{\rm{rms}}}}\left( {{\rm{helium}}} \right)}}{{{{\rm{V}}_{{\rm{rms}}}}\left( {{\rm{argon}}} \right)}}} \right],\) is close to:
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