In an adsorption isotherm, which of the following order is correct?

In the context of adsorption isotherms, the correct order indicating the relationship between temperature and the quantity adsorbed can provide significant insights into the behavior of adsorption processes at varying temperatures.

When considering the general trends in adsorption, it has been observed that as temperature increases, the amount of substance adsorbed can change due to the nature of the adsorption process, which can be either physisorption or chemisorption. Typically, for exothermic adsorption processes (which is common), the amount of adsorbate that is adsorbed tends to decrease with increasing temperature. Conversely, for endothermic adsorption processes, the amount of adsorption often increases with temperature.

If we assume the described order (T₁ > T₂ > T₃) corresponds to a situation where T₁ is the lowest temperature and T₃ is the highest, it aligns with the behavior expected for systems governed by typical adsorption characteristics, especially for most physisorption processes where lower temperatures favor higher adsorption quantities.

Thus, the correct answer indicates that at lower temperatures, more of the substance is adsorbed compared to higher temperatures, which often leads to reduced adsorption effects. This understanding helps in predicting the adsorption characteristics based on temperature changes in practical applications,