Rank `Cl_(2),SO_(2),CO_(2),CH_(4)` gases in increasing order of their rates of diffusion under identical set of conditions.

Explanation

Molar mass of the gases follows the order:
`M_(CH_(4)) lt M_(CO_(2)) lt M_(SO_(2)) lt M_(Cl_(2))`.
Hence, at constant temperature and pressure, the rates of diffusion will be in the order: `r_(Cl_(2)) lt r_(SO_(2)) lt r_(CO_(2)) lt r_(CH_(4))`.