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Which of the following gases has the lowest rate of diffusion under the same condition?...

Chemistry
WAEC 2012

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
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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.


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