Question

Types of Adsorption and their characteristics​

Answer 1

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◾️Types of adsorption:

Depending upon the nature of forces existing between adsorbate molecules and adsorbent, the adsorption can be classified into two types:

1. Physical adsorption (physisorption): If the force of attraction existing between adsorbate and adsorbent are Vander Waal’s forces, the adsorption is called physical adsorption. It is also known as Vander Waal’s adsorption. In physical adsorption the force of attraction between the adsorbate and adsorbent are very weak, therefore this type of adsorption can be easily reversed by heating or by decreasing the pressure.

2. Chemical adsorption (chemisorption): If the force of attraction existing between adsorbate and adsorbent are almost same strength as chemical bonds, the adsorption is called chemical adsorption. It is also known as Langmuir adsorption. In chemisorption the force of attraction is very strong, therefore adsorption cannot be easily reversed.

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Answer 2

There are 2 types of adsorption :

Physical and chemical

1 Physical adsorption -- If the force of attraction existing between adsorbate and adsorbent are Vanders Waal's forces .

2 Chemical adsorption -- If the force of attraction existing between adsorbent and adsorbate are almost same strength as chemical bonds .