Q .     Methylene Blue,from its aqueous solution, is adsorbed on activated charcoal at `25°C`.For this process,the correct statement is

JEE 2013 Mains
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

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