2. What are the main differences between adsorption and absorption covered in ncert Class 12 Chemistry chapter 5?
Ans- The main differences as covered in the NCERT book are given in the tabular form.
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Absorption |
Adsorption |
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The phenomenon of assimilation in which the constituent of a substance enters into the bulk phase of another substance. |
The phenomenon in which the adhesion of constituents of a substance takes place on the surface of another substance.
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Bulk phenomenon |
Surface phenomenon |
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Uniform distribution of absorbate |
Adsorbate concentrates only on the surface |
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Endothermic process |
Exothermic process |
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Independent of temperature |
Temperature-dependent |
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The rate of reaction is uniform for absorption |
The rate of reaction increases slowly and then achieves equilibrium. |
Example- absorption of liquid by a sponge.
Example- adsorption of pollutants by pollution masks.
