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Question:

Adsorption of gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas absorbed on mass m of the adsorbent at pressure p. x/m is proportional to:

P2

P14

P12

P

Solution:

The correct option is D

P12
xm=K×P1/n
logxm=logK+1nlogP
m=1n=24=12
⇒n=2
So,xm=K×P1/2
∴xmis directly proportional to theP12
Hence, the correct option is D.