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MHT CET202521 Apr 2025Evening ShiftChemistrySurface ChemistryActual

Which from following represents the Freundlich's empirical equation for adsorption of gas on solid (for n >1 )

Options

  1. Ax ~m = kp ^ 1 n
  2. Bm x = kp ^ 1 n
  3. Cx ~m = kp ^ n
  4. Dm x = kp ^ n

Correct answer

A. x ~m = kp ^ 1 n

Step-by-step solution

The Freundlich adsorption isotherm provides an empirical relationship describing the amount of gas adsorbed per unit mass of solid adsorbent in terms of pressure at a fixed temperature, expressed as x m = kP^ 1 n where x is the mass of the adsorbate, m the mass of the adsorbent, and P the pressure. Constants k and n (with n > 1 ) characterize the adsorbent-adsorbate system. Comparing with the options: Option A matches the Freundlich isotherm exactly. Option B erroneously inverts the ratio x m to m x . Option C uses

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