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COMEDK2023ChemistrySurface Chemistry

Which of the following is not true?

Options

  1. AEnthalpy change in negative for adsorption of a gas on solid.
  2. BIncrease in temperature favours adsorption.
  3. CAdsorption is a surface phenomena.
  4. DEntropy change is negative.

Correct answer

B. Increase in temperature favours adsorption.

Step-by-step solution

Adsorption is a surface phenomena that involves equillibrium between two opposing processes adsorption and desorption. Gas + Solid Gas adsorbed on solid + Heat As adsorption is exothermic thus according to Le-Chatelier's principle it will decrease with increase in temperature.

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