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JEE Advanced 2013 Paper 1

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Question : 29

Total: 60

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

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.

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