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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
Adsorption is physisorption and hence energy of activation is not required. Physisorption is exothermic and reversible and it decreases with increase in temperature.
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