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.

The empirical formula of the compound is MX.

The cation M and anion X have different coordination geometries.

The ratio of M$$-$$X bond length of the cubic unit cell edge length is 0.866.

The ratio of the ionic radii of cation M to anion X is 0.414.

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

The number of the nearest neighbours of an atom present in the topmost layer is 12

The efficiency of an atom packing is 74%

The number of octahedral and tetrahedral voids per atom are 1 and 2, respectively

The unit cell edge length is $$2 \sqrt 2$$ times the radius of the atom