'Adsorption' principle is used for which of the following purification method?

CONCEPT:

Adsorption Principle in Purification Methods

• Adsorption is a process in which atoms, ions, or molecules from a substance (which can be a gas, liquid, or dissolved solid) adhere to a surface of the adsorbent.
• It is widely used in various purification methods to separate components based on their different affinities to the adsorbent material.

EXPLANATION:

• In the context of the given purification methods:
  • Chromatography: This technique relies on adsorption principles, where different compounds in a mixture adhere to the stationary phase (adsorbent) to varying degrees, allowing their separation.
  • Sublimation: This process involves changing a substance from solid to gas without passing through the liquid phase and is not related to adsorption.
  • Extraction: This method involves separating components based on their solubilities in different immiscible liquids and does not involve adsorption.
  • Distillation: This technique separates substances based on their different boiling points and does not utilize adsorption.

Therefore, the correct answer is option 1: Chromatography, which uses the adsorption principle for purification.