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Surface Chemistry
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Chemistry
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Question : 9 of 14
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Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25° C. For this process, the correct statement is
[JEE Adv 2013 P1]
The adsorption requires activation at 25°C.
The adsorption is accompanied by a decreases in enthalpy.
The adsorption increases with increase of temperature.
The adsorption is irreversible.
Validate
Solution:
As the adsorption of methylene blue over activated characoal is physisorption , it is accompanied by decrease in enthalpy.
Adsorption of methylene blue on activated charcoal is physical adsorption hence it is characterised bydecrease in enthalpy.
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