Which of the following gases has the lowest rate of diffusion under the same condition? [H = 1.00; He = 4. 00; O = 16.0; CI = 35.5]
-
A.
CI2 -
B.
H2 -
C.
He -
D.
O2
Correct Answer: Option A
Explanation
According to Graham’s law of diffusion and effusion,
r (propto) (sqrt{frac{1}{M}}).
Therefore, the more the molar mass, the less the rate of diffusion and effusion.