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JEE Main20199 Jan 2019Morning ShiftChemistrySurface ChemistryActual

Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure P . x m is proportional to:

Options

  1. Ap 1 4
  2. Bp
  3. Cp 2
  4. Dp 1 2

Correct answer

D. p 1 2

Step-by-step solution

According to the Freundlich adsorption isotherm, x m = K p 1 n Taking log on both sides. l o g x m = l o g K + 1 n log ⁡ P Slope from graph = y 2 - y 1 x 2 - x 1 = 2 4 = 1 2 or, 1 n = 1 2 ∴ x m = K p 1 2 or x m ∝ p 1 2

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