For adsorption of a gas on a solid, the plot of log x/m vs log p is linear with slope equal to (n being a whole number)
k
log k
n
1/n
The material on the surface of which the adsorption takes place is known as ____________
adsorbate
absorbate
adsorbent
absorbent
At the critical micelle concentration (CMC) the surfactant molecules
Decompose
Dissociate
Associate
Become completely soluble
The method usually employed for the precipitation of a colloidal solution is
Dialysis
Addition of electrolytes
Diffusion through animal membrane
Condensation
Physical adsorption of a gas by a solid is generally _____________
Reversible
Irreversible
Permanent
Stable
If accumulation of gas on the surface of a solid occurs on account of weak Van der Waal's forces,the adsorption is termed as ___________
Physisorption
Chemisorption
desorption
Sorption
Which one of the following forms micelles in aqueous solution above certain concentration?
Urea
Dodecyl trimethyl ammonium chloride
Pyridium chloride
Glucose
The Langmuir adsorption isotherm is deduced by using the assumption that
the adsorption takes place in multi -layers
the adsorption sites are equivalent in their ability to absorb the particles
the heat of adsorption varies with coverage
the adsorbed molecules varies with each other
Which of the following forms cationic micelles above certain concentration?
Sodium ethyl suhphate
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
