Question

Two vessels having equal volume contain molecular hydrogen at one atmosphere and helium at two atmospheres respectively. What is the ratio of rms speeds of hydrogen molecule to that of helium molecule if both the samples are at same temperature.
A. `(V_(rms))_(n)=(V_(rms))_(He)`
B. `(V_(rms))_(He)=sqrt(2)(V_(rms))_(H)`
C. `(V_(rms))_(H)=sqrt(2)(V_(rms))_(He)`
D. `(V_(rms))_(H)=2(V_(rms))_(He)`

Answer 1

Correct Answer - C
`v_(rms)=sqrt((3RT)/(M))rArrv_(rms)prop(1)/sqrt(M)`