Chemisorption results in a unimolecular layer.

The enthalpy change during physisorption is in the range of 100 to $140 \mathrm{~kJ} \mathrm{~mol}^{-1}$.

Chemisorption is an endothermic process.

Lowering the temperature favors physisorption processes.

The process of precipitating colloidal sol by an electrolyte is called peptization.

Colloidal solution freezes at higher temperature than the true solution at the same concentration.

Surfactants form micelle above critical micelle concentration (CMC). CMC depends on temperature.

Micelles are macromolecular colloids.

Adsorption is accompanied by decrease in ethalpy and decrease in entropy of the system

The critical temperatures of ethane and nitrogen are $$563$$ $$K$$ and $$126$$ $$K,$$ respectively. The adsorption of ethane will be more than that of nitrogen on same amount of activated charcoal at a given temperature

Cloud is an emulsion type of colloid in which liquid is dispersed phase and gas is dispersion medium

Brownian motion of colloidal particles does not depend on the size of the particles but depends on viscosity of the solution

O₂ is physisorbed

Heat is released

Occupancy of $$\pi _{2p}^*$$ of O₂ is increased

Bond length of O₂ is increased