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Methylene blue, from its aqueous solutio...

Methylene blue, from its aqueous solution is adsorbed on activated charcoal at `25^(@)C.`For this process, the correct statement is

A

The adsorption requires activation at `25^(@)C`

B

The adsorption is accompanied by a decrease in enthalpy.

C

The adsorption increases with increase of temperature

D

The adsorption is irreversible.

Text Solution

Verified by Experts

The correct Answer is:
B
The adsorption of methylene blue on activated charcoal is an example of physiosorption which is exothermic, multilayer and does not have energy barrier
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DISHA PUBLICATION-SURFACE CHEMISTRY-Exercise-2 :Concept Applicator
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  2. Although, nitrogen does not adsorb on a surface at room temperature, i...

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  3. Methylene blue, from its aqueous solution is adsorbed on activated cha...

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  4. In freundlich adsorption isotherm, the value of 1/n is :

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  5. Which one of the following is not applicable to the phenomenon of adso...

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  6. Which of the following statements is incorrect regarding physisorption...

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  7. In the titration of Cl^(-)ions in solution with AgNO(3) sodium salt of...

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  8. In an experiment, 200 mL of 0.5M oxalic acid is shaken with 10 g of ac...

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  9. The oxidation of oxalic acid by acidified KMnO4 becomes fast as the re...

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  10. A chemical reaction has catalyst X. Hence X

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  11. On adding AgNO(3) solution into KI solution, a negatively charged coll...

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  12. A sol is prepared by addition of excess of AgNO(3) solution in KI solu...

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  13. The gold numbers of protective colloids A,B,C and D are 0.04, 0.004, 1...

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  14. which of the following statement is not true about the oil - in - wat...

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  15. Select incorrect statement

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  16. for the coagulation of 50 mL of ferric hydroxide sol 10 mL of 0.5 M KC...

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  17. If the dispersed phase is a liquid and the dispersion medium is a soli...

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  18. Coagulation value of the electrolytes AlCl(3) and NaCl for As(2)S(3) s...

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  19. The density of gold is 19 g //cm^(2).Find the volume of 95 g of gold.

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  20. The charge on the colloidal particle is due to preferential adsorption...

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