Q.

In langmuir's model of adsorption of a gas on a solid surface:

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a

the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered

b

the adsorption at a single site on the surface may involve multiple molecules at the same time

c

the mass of gas striking a given area of surface is proportional to the pressure of the gas 

d

the mass of gas striking a given area of surface is independent of the pressure of the gas

answer is C.

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Detailed Solution

The mass of gas impacting a specific area of surface is related to the gas's pressure, according to Langmuir's adsorption isotherm, as

xm=kp1+kp.

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