Macromolecules in suitable solvents form solutions in which the size of the macromolecules may be in the colloidal range such systems are called ___________colloids.

Substances which alter the rate of a chemical reaction and themselves remain chemically and quantitatively unchanged after the reaction are known as

______________is a heterogeneous system in which one substance is dispersed as very fine particles in another substance called dispersion medium.

___________gave an empirical relationship between the quantity of gas adsorbed by unit mass of solid adsorbent and pressure at a particular temperature.

_____________theory explains why the catalyst remains unchanged in mass and chemical composition at the end of the reaction and is very effective even in small quantities.

The extent of adsorption increases with the increase of __________of the adsorbent.

_____________is the process of separating the colloidal particles from the solvent and suitable solutes present in the colloidal solution by specially prepared filters,which are permeable to all substances except the colloidal particles.

The hardening of leather with the help of tannin is known as

Soap lather is an example of

Colloidals sols directly formed by mixing substances like gum,gelatine,starch,rubber etc..with a suitable liquid are called