Question

According to Langmuir adsorption isotherm the amount of gas adsorbed at very high pressure

(a) reaches a constant limiting value

(b) goes on increasing with pressure

(c) goes on decreasing with pressure

(d) increases first and decreases later with pressure.

Answer 1

Correct Option : (a)

Explanation—

Langmuir adsorption isotherm is applicable for monolayer adsorption which fails at high pressure because the mass adsorbed reaches a constant value when the adsorbed surface is completely covered by a unimolecular layer of gases.