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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