Question

For adsorption of gas on solid surface, the plot of log `x/m` vs log P is linear with a slope equal to ______.

Options

• k

• log k

• ln k

• `1/n` (n being an integer)

Answer 1

For adsorption of gas on solid surface, the plot of log `x/m` vs log P is linear with a slope equal to `\underlinebb((1/n) "(n being an integer)")`.

Explanation:

According to the Freundlich adsorption isotherm, the amount adsorbed per unit mass is given by:

`x/m = kP^(1//n)`

Taking logarithms,

`log  x/m = 1/n log P + log k`

Thus, a plot of log `x/m` vs log P is linear with a slope equal to `1/n`.