The method usually employed for the precipitation of a colloidal solution is
Dialysis
Addition of electrolytes
Diffusion through animal membrane
Condensation
Position of non-polar and polar parts in micelle is
Polar at outer surface but non-polar at inner surface
Polar at inner surface but non-polar at outer surface
Distributed all over the surface
Present in the surface only
Both adsorption and absorption can take place simultaneously,the term_________is used to describe both the processes.
desorption
chemisorption
sorption
Physisorption
Which one of the following forms micelles in aqueous solution above certain concentration?
Urea
Dodecyl trimethyl ammonium chloride
Pyridium chloride
Glucose
The molecular species or substance,which concentrates or accumulates at the surface is termed as ________
absorbate
adsorbate
adsorbent
absorbent
_________have no interfaces.
Solids
liquids
gases
Water and kerosene
The variation in the amount of gas adsorbed by the adsorbent with pressure at constant temperature can be expressed by means of a curve known as ____________.
adsorption isotherm
adsorption isobar
adsorption isotones
Isoelectric
Which is not correct regarding the adsorption of a gas on surface of solid?
On increasing temperature adsorption increases continuously
Enthalpy and entropy change is negative
According to the adsorption theory of catalysis, the speed of the reaction increases because
Absorption produces heat which increases the speed of the reaction
Adsorption lowers the activation energy of the reaction
The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption.
In the process of adsorption, the activation energy of the molecules becomes large
The ability of anion to bring about coagulation of a given colloid depends upon
Its charge
Th sign of the charge alone
The magnitude of its of its charge
Both magnitude and sign of its charge
