Which of the following bond/interaction is not involved in adsorption?

Which of the following bond/interaction is not involved in adsorption? Correct Answer Covalent bond

Covalent bonding is not involved in adsorption as it is the strongest bond and adsorption proceeds with weaker bonds. Ionic interaction, Hydrogen bonding, Van der Waals forces are the weaker bonds or interaction involved in adsorption.

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