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Chemical adsorption...

Chemical adsorption

A

is reversible

B

takes place at low temperature

C

is endothermic

D

is exothermic

Text Solution

Verified by Experts

The correct Answer is:
D
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Which one of the following statements is wrong? a. Physical adsorption of gas directly related to its critical temperature. b. Chemical adsorption decreases regularly as the temperature is increased. c. Adsorption is an exothermic process. d. A solid with a smooth surface.

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Activated adsorption is also known as chemical adsorption or chemisorption. Reason (R): It involves formation of chemical bonds between adsorbent and reactants.

In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Activated adsorption is also known as chemical adsorption or chemisorption. Reason (R): It involves formation of chemical bonds between adsorbent and reactants.

Assertion :- In case of chemical adsorption, (x)/(m) first increase then decrease with temp. Reason :- The intial increase is due to the fact that heat supplied acts as a activation energy. The decrease afterwards is due to the exothermic nature of adsorption at equilibrium.

Physical Adsorption|Chemical Adsoption

In physical adsorption, the molecules of adsorbate are held by chemical forces.

The heat of adsorption of physical adsorption is nearly

Chemisortion is………………… while physical adsorption adsorption is ………………….. In nature.

Assertion :- The graphical representation of physical adsorption with temp is Reason :- This is weak adsorption & adsorption is exothermic process.

MARVEL PUBLICATION-SURFACE CHEMISTRY-TEST YOUR GRASP
  1. Chemical adsorption

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  2. which of the following will have the highest coagulating power for As(...

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  3. Hydophillic collids are stable due to

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  4. In physical adsorption, gas molecules are bound on the solid surface b...

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  5. Lyophilic sols are more stable than lyophobic sols because :

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  6. When the dispersion medium is gas, colloidal solution is

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  7. When a beam to light is passed through colloidal solution.

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  8. Migration of colloidal particles under the influence of electrie field...

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  9. Cleaning action of detergent is due to

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  10. The role of a catalyst is to change

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  11. Emulsion, out of the following is

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  12. Surface tension of hydrophilic solution is

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  13. Which of the following is not a colloid ?

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  14. The number of phases in colloidal system are

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  15. Which of the following does not form lyophilic sol ?

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  16. Crystalloids differ from colloids mainly is respect of :

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  17. Identify the gas which is readily adsorbed by activated charcoal?

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  18. The process of migration of dispersion medium under the influence of e...

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  19. The curve between adsorption and pressure at constant temperature is c...

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  20. Cloud represents an example

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  21. A colloidal solution of blood is an example of

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