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Question
Freundlich adsorption isotherm is given by the expression `x/m = kp^(1/n)` which of the following conclusions can be drawn from this expression.
(i) When `1/n` = 0, the adsorption is independent of pressure.
(ii) When `1/n` = 0, the adsorption is directly proportional to pressure.
(iii) When n = 0, `x/m` vs p graph is a line parallel to x-axis.
(iv) When n = 0, plot of `x/m` vs p is a curve.
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Solution
(i) When `1/n` = 0, the adsorption is independent of pressure.
(iii) When n = 0, `x/m` vs p graph is a line parallel to x-axis.
Explanation:
Freundlich gave an empirical relationship between the quantity of gas adsorbed by unit mass of solid adsorbed and pressure at a particular temperature.
`x/m = kp^(1/n)`
If `1/n` = 0; `x/m = k` extent of adsorption is independent of pressure
When n = 0; `x/m = kp`
`x/m` vs p is a line parallel to x-axis
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