On the basis of data given below, predict which of the following gases shows least adsorption on a definite amount of charcoal?

Gas	CO₂	SO₂	CH₄	H₂
Tc(K)	304	630	190	33

Correct option is D

Adsorption is directly related to the critical temperature (Tc) of the gas. Higher Tc → Greater adsorption. Here, H₂ has the lowest critical temperature (33 K), so it exhibits least adsorption on charcoal.