Which of the following gases is adsorbed most by activated charcoal?

Options

A. `SO_(2)`
B. `CH_(4)`
C. `H_(2)`
D. All are equally adsorbed

Answer

A

Explanation

Gases with higher critical temperatures are readily adsorbed. Thus `1gram` of activated charcoal adsorbs more `SO_(2)` (critical temp.`630K`) than methane (critical temp `190K`) which is still more than dhiydrogen (critical temperature `33K`).
Notice that the value of critical temop-erature isd directly related to the molar mas of gas.