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Quiz 2
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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_2SNa2S
NaCl
Na3PO4Na_3PO_4Na3PO4
Na2SO4Na_2SO_4Na2SO4
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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