The Langmuir adsorption isotherm is deduced by using the assumption that
the adsorption takes place in multilayers
the adsorption sites are equivalent in their ability to adsorb the particles
the heat of adsorption varies with coverage
the adsorbed molecules interact with each other
When a large number of atoms or small molecules of a substance combine together in a dispersion medium to form aggregates having size in the colloidal range, the colloidal solutions thus formed are called
Multimolecular colloids
Macromolecular colloids
Associated colloids
Lyophobic colloids
Which one of the following forms micelles in the aqueous solution above certain concentration?
Urea
Glucose
Pyridinium chloride
Dodecyl trimethyl ammonium chloride
Hydrophilic sols are also known as
Reversible
Irreversible
Lyophobic
Hydrophobic
Which of the following forms cationic micelles above certain concentration?
Sodium ethyl sulphate
Sodium acetate
Cetyl trimethyl ammonium bromide
During dialysis
only solvent molecules can diffuse
Solvent molecules, ions and colloidal particles can diffuse
all kinds of particles can diffuse through the semipermeable membrane
Solvent molecules and ions can diffuse
Which of the following colloids are solvent – loving colloids ?
Lyophilic
None of these
A colloidal solution of Fe ( OH ) 3 in water is called a
Colloid
Emulsion
Hydrophilic
The method usually employed for the precipitation of a colloidal solution is
dialysis
addition of electrolytes
diffusion through animal membrane
condensation
Certain substance form large molecules whose dimensions are comparable to those of colloidal particles. Such molecules have very high molecular masses are termed as
Multimolecules
Macromolecules
Nanomolecules
Associated
