Q.1
What is an emulsion?
  • Solid in liquid colloidal sol.
  • Solid in gas colloidal sol.
  • Liquid in liquid colloidal sol.
  • All of the above
Q.2
When dispersed phase is liquid and dispersion medium is gas, the colloidal system is called:
  • Aerosol
  • Emulsion
  • Smoke
  • Gel
Q.3
Adsorption is a................process
  • Exothermic process
  • Endothermic process
  • Both
  • None
Q.4
The minimum temperature required for formation of associated colloid is called...........
  • Critical temperature
  • Inversion temperature
  • Kraft temperature
  • Boyle's temperature
Q.5
Entropy during adsorption ...........
  • Decreases
  • Increases
  • Remain Same
  • Cannot say
Q.6
Peptisation is a process of
  • Precipitation of colloid
  • Dispersion of precipitate
  • purification of colloids
  • Movement of colloid under electric potential
Q.7
The difference in potential of fixed and mobile layer is called ..........
  • Zeta Potential
  • Colloidal potential
  • Electrostatic potential
  • All of above
Q.8
Extent of physisorption increases with
  • decrease in surface area
  • increase in temperature
  • decrease in temperature
  • decrease in strength of van der waal forces
Q.9
In physisorption adsorbent does not show specificity for any particular gas because ______________.
  • involved van der Waals forces are universal
  • it is a reversible process
  • Enthalpy is low
  • Gases behave as ideal gases
Q.10
Which of the following electrolytes will have maximum coagulating value for AgI/Ag+ sol? (AgI/Ag+ implies positive sol)
  • Na2SNa_2SNa2​S
  • NaCl
  • Na3PO4Na_3PO_4Na3​PO4​
  • Na2SO4Na_2SO_4Na2​SO4​
Q.11
If the dispersed phase is a liquid and the dispersion medium is solid, the colloid is known as
  • Emulsion
  • Solid Sol
  • Gel
  • Sol
Q.12
The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as
  • Tyndall Effect
  • Brownian Motion
  • Electrophoresis
  • Coagulation
Q.13
The process of settling of colloidal particle is called....
  • Peptization
  • Caogulation
  • Dialysis
  • Emulsification
Q.14
It is a process of removing a dissolved substance from a colloidal solution by means of diffusion through a suitable membrane
  • Electrophoresis
  • Dialysis
  • Precipitation
  • Peptization
Q.15
Which is not true for chemisorption?
  • It involves high activation energy
  • It is highly specific
  • It involves chemical bond formation
  • It is reversible
Q.16
Rough surface of an adsorbent has
  • More porus
  • Non porus
  • More active centres
  • Less active centres
Q.17
When the concentration of adsorbate is more on the surface than the bulk of the adsorbent it is called as
  • Positive adsorption
  • Negative adsorption
  • Positive absorption
  • Negative absorption
Q.18
Surface compound formation takes place in
  • Physical adsorption
  • Desorption
  • Chemical adsorption
  • Sorption
Q.19
Chemisorption is held by
  • Covalent bond
  • Chemical forces
  • Van der Waal forces
  • Centrifugal
Q.20
Physisorption is held by
  • Covalent forces
  • Chemical forces
  • Vander Waal forces
  • Centrifugal forces
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