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  • Which of the following statements is/are correct? (1) Desorption is a process of removing an adsorbate from the surface of the adsorbent. (2) In absorption, liquid or gas get un

Which of the following statements is/are correct?

(1) Desorption is a process of removing an adsorbate from the surface of the adsorbent.

(2) In absorption, liquid or gas get uniformly distributed throughout the bulk of the solid.

(3) Rate of desorption will increase with increase in temperature.

(4) Rate of desorption will decrease with increase in temperature.

Option: 1

(1), (2) and (4) only


Option: 2

(1), (2) and (3) only


Option: 3

 (1) and (2) only


Option: 4

 None of the above


Answers (1)

best_answer

 Desorption is a process of removing an adsorbed substance (adsorbate) from a surface on which it is adsorbed (adsorbent).

Removing the gases \left(\mathrm{O}_{2}, \mathrm{~N}_{2}, \mathrm{H}_{2}\right.\mathrm{etc.}) from the metal surface is an example of desorption.

Since, adsorption is an exothermic reaction. Increasing the temperature of adsorption will increase the rate of backward reaction so is the rate of desorption.

Absorption is a phenomenon in which the particles of gas or liquid get uniformly distributed throughout the body of the solid.

Example: Anhydrous \mathrm{CaCl}_{2} is a desiccator.

 

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