Helium and methane are allowed to diffuse out of a container under similar conditions of temperature and pressure. The ratio of the rate of diffusion of helium to methane is:

2 : 1

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1 : 4

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1 : 2

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4 : 1

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Solution

The correct option is A 2 : 1
$\frac{r_{H e}}{r_{C H_{4}}} = \sqrt{\frac{M_{C H_{4}}}{M_{H e}}} = \sqrt{\frac{16}{4}} = \frac{4}{1}$

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Helium and methane are allowed to diffuse out of a container under similar conditions of temperature and pressure. The ratio of the rate of diffusion of helium to methane is:

The correct option is A 2 : 1rHerCH4=√MCH4MHe=√164=41

The correct option is A 2 : 1
$\frac{r_{H e}}{r_{C H_{4}}} = \sqrt{\frac{M_{C H_{4}}}{M_{H e}}} = \sqrt{\frac{16}{4}} = \frac{4}{1}$