The correct ascending order of adsorption of the following gases on the same mass of charcoal at the same temperature and pressure is

Options

A. `CH_(4)lt H_(2)SO_(2)`
B. `H_(2)lt CH_(4)lt SO_(2)`
C. `SO_(2)lt CH_(4)lt H_(2)`
D. `H_(2)lt SO_(2)lt CH_(4)`

Answer

B

Explanation

More easily a gas is liquefiable, higher is its cirtical temperature and greater is its adsorption. Critical temepratures in K are
`{:(H_(2)lt " "CH_(4)lt " "SO_(2)), (33.2 " "190.6 " "430.3):}`
or ease of liquefaction is `H_(2)lt CH_(4) lt SO_(2).`
Hence, ascending order of adsorption is `H_(2) lt CH_(4)lt SO_(2).`