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

Adsorption is $\mathrm{spontaneous} (\mathrm{\Delta G}<0) \mathrm{andtakesplacewith}$ decrease in entropy (due to decrease in disorder).

$\text{ Thus, }\mathrm{\Delta }S<0$

$\text{ Since, }\mathrm{\Delta G}=\mathrm{\Delta H}-\mathrm{T\Delta S}\Rightarrow \mathrm{\Delta H}=(\mathrm{\Delta G}+\mathrm{T\Delta S})$

$\text{ Since, both }\mathrm{\Delta G}<0,\text{ and }\mathrm{\Delta S}<0$

$\mathrm{Hence}, \mathrm{\Delta H}<0 (\mathrm{exothermic})$

By Le-Chatelier's principle, increase in temperature, decreases adsorption.