| Which among the following statements are correct with respect to adsorption of gases on a solid? |
| (i) The extent of adsorption is equal to \[k{{p}^{n}}\]according to Freundlich isotherm. |
| (ii) The extent of adsorption is equal to\[k{{p}^{1/n}}\]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. |
A) (i) and (iii)
B) (i) and (iv)
C) (ii) and (iii)
D) (ii) and (iv)
Correct Answer: D
Solution :
[d]: Extent of adsorption,\[\frac{x}{m}=k{{p}^{l/n}}\] (Freundlich adsorption isotherm) The amount of gas adsorbed does not increase as rapidly as the pressure. Extent of adsorption, \[\frac{x}{m}=\frac{ap}{(1+bp)}\] (Langmuir adsorption isotherm) where k, a, b are constants and p is a pressure.
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