Under identical conditions of temperature and pressure the ratio of the rates of effusion of `O_(2)` and `CO_(2)` gases is given by

Options

A. `("rate of effusion of oxygen")/("rate of effusion of carbon dioxide") = 0.87`
B. `("rate of effusion of oxygen")/("rate of effusion of carbon dioxide") = 1.17`
C. `("rate of effusion of oxygen")/("rate of effusion of carbon dioxide") = 8.7`
D. `("rate of effusion of oxygen")/("rate of effusion of carbon dioxide") = 0.117`

Answer

B

Explanation

`(r_(O_(2)))/(r_(CO_(2))) = sqrt(("Mol mass of "CO_(2))/("Mol mass of O_(2))`
`= sqrt((44)/(32)) = sqrt((11)/(4))`
`= sqrt(1.375) = 1.17`