Question

Which gas is adsorbed in minimum amount by the activated charcoal?

Answer 1

Adsorption

• One chemical gathers in increasing concentrations on the surfaces of another is called adsorption.
• The particles are more attracted to each other, one and only when the gas has a higher critical temperature.
• The rate of gas adsorbed gets increased on the surface of activated charcoal.
• The gas that is hard to liquefy which it has a low critical temperature is adsorbed in a smaller amount, and vice versa.

Minimum adsorption by activated charcoal:

• Because hydrogen has a minimal critical temperature of $(-240°\mathrm{C})$, it is adsorbed in the smallest quantity.
• For ${\mathrm{H}}_2$, the molecular weight is${\mathrm{H}}_2=1\times 2=2$.
• Thus, Hydrogen will have minimum amount of adsorption by activated charcoal.