Question

If the molecular weight of two gases are M₁ and M₁, then at a temperature the ratio of root mean square velocity v₁ and v₂ will be

• A. $\sqrt{\frac{M_{1}}{M_{2}}}$
• B. $\sqrt{\frac{M_{2}}{M_{1}}}$
• C. $\sqrt{\frac{M_{1} + M_{2}}{M_{1} - M_{2}}}$
• D. $\sqrt{\frac{M_{1} - M_{2}}{M_{1} + M_{2}}}$

Answer 1

Answer: (B)

$\sqrt{\frac{M_{2}}{M_{1}}}$

Answer 2

$v_{rms} = \sqrt{3RT/M}$Ž $\frac{v_{1}}{v_{2}} = \sqrt{\frac{M_{2}}{M_{1}}}$