Question

Temperature at which r.m.s. speed of $O_2$ is equal to that of neon at $300K$ is:

• A. $280K$
• B. $480K$
• C. $680K$
• D. $180K$

Answer 1

Answer: (B)

$U_{rms}=\sqrt{\frac{T}{M_w}}T\propto M_w$
$\frac{T_{Ne}}{T_{o_2}}=\frac{20}{32}$
$T_{o_2}=480K$