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WorksheetsSurface Chemistry
Total questions: 15
Worksheet time: 30mins
What kind of process is adsorption?
(a)
Entropy during adsorption ...........
Decreases
Increases
Remain Same
Cannot say
Peptisation is a process of
Precipitation of colloid
Dispersion of precipitate
purification of colloids
Movement of colloid under electric potential
The difference in potential of fixed and mobile layer is called (a)
Extent of physisorption increases with
decrease in surface area
increase in temperature
decrease in temperature
decrease in strength of van der waal forces
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
At high concentration of soap in water, soap behaves as
multimolecular colloid
macromolecular colloid
associated colloid
Solution
The minimum temperature required for formation of associated colloid is called...........
Critical temperature
Inversion temperature
Kraft temperature
Boyle's temperature
Which of the following electrolytes will have maximum coagulating value for AgI/Ag+ sol? (AgI/Ag+ implies positive sol)
Na2S
NaCl
Na3PO4
Na2SO4
Which of the following ion will have highest coagulating power for coagulating a negatively charged sol?
NaCl
CaCl2
AlCl3
KCl
If the dispersed phase is a liquid and the dispersion medium is solid, the colloid is known as
Emulsion
Solid Sol
Gel
Sol
The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as
Tyndall Effect
Brownian Motion
Electrophoresis
Coagulation
The process of settling of colloidal particle is called....
Peptization
Caogulation
Dialysis
Emulsification
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
Which is not true for chemisorption?
It involves high activation energy
It is highly specific
It involves chemical bond formation
It is reversible
