MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous stateGraham's Law of Diffusion and effusion
If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is
A.2.0✓ Correct
B.1.0
C.0.5
D.4.0
Explanation
We know that, Graham’s law stated 1r helium gas 2r methane gas 1 2 2 1 1 2 1/ / / / 16 / 4 2 /1. r M r r M M r r