MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous stateGraham's Law of Diffusion and effusion

Which of the following gas will have highest rate of diffusion?

A.NH3✓ Correct

B.N2

C.CO2

D.O2

Explanation

Rate of diffusion is inversely proportional to the square root of molecular weight. 1 R MW Here, Molecular weight ( 3 NH ) =17 Molecular weight ( 2 N ) =28 Molecular weight ( 2 CO ) = 44 Molecular weight ( 2 O ) =32 As it can be seen 3 NH has lowest molecular weight among them. Thus, it will have highest rate of diffusion.

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