The curve that best describes the adsorption of a gas (x gas) on 1.0 g of a solid substrate as a function of pressure (p) at a fixed temperature is:

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Solution

The correct option is B 2
According to Freundlich adsorption isotherm,
$(x / m) = k . p^{1 / n} (n > 1) m = 1 g (g i v e n) ∴ x = k p^{1 / n} (\frac{x}{k})^{n} = p y^{n} = x (e q u a t i o n o f p a r a b o l a)$
(if n=2)

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