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Which among the following statements are connect with respect to adsorption of gases on a solid ?$\; \;$ (1) The extent of adsorption is equal to $\;kp^{n}\;$ according to freundlich isotherm.$\;\;$ (2) The extent of adsorption is equal to $\;kp^{\large\frac{1}{n}}\;$ according to freundlich isotherm . $\;\;$ (3) The extent of adsorption is equal to $\;\large\frac{(a+bp)}{ap}\;$ according to freundlich isotherm . $\;\;$ (4) The extent of adsorption is equal to $\;\large\frac{ap}{(1+bp)}\;$ according to freundlich isotherm . $\;\quad\;$ (5) Freundlich adsorption fails at a low pressure .

$(a)\;1\;and\;3\qquad(b)\;1\;and\;4\qquad(c)\;2\;and\;3\qquad(d)\;2\;and\;4$

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Answer : 2 and 4
Explanation :
According freundlich isotherm ,
$\large\frac{x}{m}=kp^{\large\frac{1}{n}}$
According to Langmuir isotherm ,
$\large\frac{x}{m}=\large\frac{ap}{1+bp}\;.$
answered Mar 18, 2014 by yamini.v
 

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