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Question

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

[IIT-JEE-Advanced 2013]


A

The adsorption required activation at 25°C

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B

The adsorption is accompanied by a decrease in enthalphy

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C

The adsorption increases with increase of temperature

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D
The adsorption is irreversible
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