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Q.1
Absorption is a
Bulk phenomena
Surface phenomena
Both
None of these
Q.2
In Freundlich adsorption isotherm x/m = Kp1/n, the value of ‘n’ at low pressure is
more than one.
less than one.
equal to one.
from zero to one.
Q.3
Which of the following ion will have highest coagulating power for coagulating a negatively charged sol?
NaClNaClNaCl
CaCl2CaCl_2CaCl2
AlCl3AlCl_3AlCl3
KClKClKCl
Q.4
'Greater the valency, the higher is the ciagulating power of ion'. This rule was introduced by
Hardy Schulz
Maxwell
Kisses lewis
Faraday
Q.5
In....................catalysis state of reactants and catalyst is different
Homogeneous
Heterogeneous
Both
None
Q.6
Air is a
compound
element
heterogeneous mixture
solution
Q.7
Which of the following process is not responsible for the presence of electric charge on the sol particles?
Electron capture by sol particles.
Adsorption of ionic species from solution.
Formation of Helmholtz electrical double layer.
Absorption of ionic species from solution
Q.8
The values of colligative properties of colloidal solution are of small order in comparison to those shown by true solutions of same concentration because of colloidal particles __________________.
exhibit enormous surface area.
remain suspended in the dispersion medium.
form lyophilic colloids.
are comparatively less in number.
Q.9
A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as ____________.
solid solution
gel
emulsion
solution
Q.10
Method by which lyophobic sol can be protected.
By addition of oppositely charged sol.
By addition of an electrolyte.
By addition of lyophilic sol.
By boiling.
Q.11
Which of the following will show Tyndall effect?
Aqueous solution of soap below critical micelle concentration.
Aqueous solution of soap above critical micelle concentration.
Aqueous solution of sodium chloride.
Aqueous solution of sugar.
Q.12
Which of the following interface cannot be obtained?
liquid-liquid
solid-liquid
liquid-gas
gas-gas
Q.13
Which of the following process does not occur at the interface of phases?
crystallisation
heterogenous catalysis
homogeneous catalysis
corrosion
Q.14
At the equilibrium position in the process of adsorption ___________.
ΔH > 0
ΔH = TΔS
ΔH > TΔS
ΔH < TΔS
Q.15
Which one of the following is not applicable to the phenomenon of adsorption?
ΔH > 0
ΔG < 0
ΔS < 0
ΔH < 0
Q.16
Freshly prepared precipitate sometimes gets converted to colloidal solution by ___________.
coagulation
electrolysis
diffusion
peptisation
Q.17
Which of the following process is responsible for the formation of delta at a place where rivers meet the sea?
Emulsification
Colloid formation
Coagulation
Peptisation
Q.18
Peptization denotes:
Digestion of food
Hydrolysis of protein
Breaking and dispersion into colloidal state
Precipitation of solid from colloidal dimension
Q.19
Bredig's arc method is used for the preparation of colloidal soln of:
Metal like silver, gold, etc
Organic compounds
Two liquids
Inorganic compounds
Q.20
Temperature above which micelles formation takes place is called as
Critical temperature
Kraft temperature
Freezing point
None of these
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