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Surface Chemistry question

2013 · Shift 1 · Q6
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Surface Chemistry question

2013 · Shift 1 · Q6

JEE AdvancedChemistrySurface ChemistryMCQ+3 / −0.75
Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25oC. For this process, the correct statement is
  1. A
    The adsorption requires activation at 25oC.
  2. B
    The adsorption is accompanied by a decrease in enthalpy
  3. C
    The adsorption increases with increase of temperature
  4. D
    The adsorption is irreversible
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