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Get Answers to all your Questions
Which of the following statements about physical adsorption is true?
It occurs due to electrostatic forces between the adsorbate and adsorbent.
It results in a stronger bond between the adsorbate and adsorbent than chemical adsorption.
It is irreversible in nature.
It occurs only at low temperatures.
Answers (1)
Physical adsorption is also known as physisorption or van der Waals adsorption. It occurs due to the weak attractive forces between the adsorbate (molecules or ions in the gas or liquid phase) and adsorbent (solid surface). These forces include London dispersion forces, dipole-dipole interactions, and hydrogen bonding.
Option B is incorrect because chemical adsorption results in a stronger bond between the adsorbate and adsorbent than physical adsorption. Option C is incorrect because physical adsorption is reversible in nature, while chemical adsorption is irreversible. Option D is incorrect because physical adsorption occurs at all temperatures, but the extent of adsorption decreases with increasing temperature.
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