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WorksheetsSurface Chemistry I
Total questions: 10
Worksheet time: 5mins
Adsorption is a
Bulk phenomena
Surface phenomena
Both
None of these
Rough surface of an adsorbent has
More porus
Non porus
More active centres
Less active centres
In gas masks which substance is used to absorb toxic gases and vapours?
Coal powder
Animal charcoal
Wood charcoal
Activated charcoal
Absorption is a
Bulk phenomena
Surface phenomena
Both
None of these
Which can be used as an adsorbent for removal of moisture and controlling humidity in room?
Silicon
Clay
Silica
Ceramic
The amount of heat evolved when one mole of a gas is adsorbed on a solid surface is called as
Molar enthalpy of absorption
Molar enthalpy of desorption
Molar enthalpy of adsorption
entropy of adsorption
Physisorption is held by
Covalent forces
Chemical forces
Vander Waal forces
Centrifugal forces
Chemisorption is held by
Covalent bond
Chemical forces
Van der Waal forces
Centrifugal
Surface compound formation takes place in
Physical adsorption
Desorption
Chemical adsorption
Sorption
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
