In Langumir's model of adosrption of a gas on a solid surface :

Options

A. the mass of gas striking a given area of surface is proportional to the pressure of the gas.
B. the mass of gas striking a given area of surface is independent of the pressure of the gas
C. the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered
D. the adsorption at a single site on the surface may involve multiple molecules at the same time

Answer

A

Explanation

According to Langmuir.s model of adsorption of a gas on a solid surface, the mass of gas adsorbed (x) per gram of the adsorbent (m) is directly proportional to the pressure of the gas (p) at constant temperature.