Q. Which among the following statements are correct with respect to adsorption of gases on a solid? (i)The extent of adsorption is equal to $Kp^{n}$ according to Freundlich isotherm. (ii)The extent of adsorption is equal to $Kp^{1/n}$ according to Freundlich isotherm. (iii)The extent of adsorption is equal to $(1 + bp)/ap\ \$according to Langmuir isotherm. (iv) The extent of adsorption is equal to $ap/(1 + bp)$according to Langmuir isotherm. (v)Freundlich adsorption isotherm fails at low pressure, where $k,\ a\ and\ b$ are constant and $p$ is pressure
A) (i) and (iii)
B) (i) and (iv)
C) (ii) and (iii)
D) (ii) and (iv)
Explanation
(d)
Extent of adsorption = $kp^{1/n}$
(Freundlich adsorption isotherm)
The amount of gas adsorbed does not increase as rapidly as the pressure.
The extent of adsorption=$\frac{ap}{(1 + bp)}$
(Langmuir adsorption isotherm)
Where, $k,\ a,\ b$ are constants and $p$ is pressure.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.