Related Questions

In physical adsorption, as compared to chemisorption, the
A Quantity adsorbed per unit mass is higher
B Rate of adsorption is controlled by the resistance to surface reaction
C Activation energy is very high
D Heat of adsorption is very large
Chemisorption compared to physical absorption has
A Lower adsorption rate
B Lower capacity of the solvent for the solute gas
C Increased utilisation of stagnant zones of the liquid phase
D None of these
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.
A Always lower than
B Always higher than
C Same as
D Dependent on the system; can be either lower or higher than
In case of physical adsorption, the heat of adsorption is of the order of __________ kcal/kg.mole.
A 100
B 1000
C 10000
D 100000
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is
A Equal to the heat of formation of surface compound
B Equal to the heat of wetting
C Zero
D Called integral heat of adsorption
For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
A Physical
B Chemical
C Both A and B
D Neither A nor B
Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
Removal of __________ exemplifies an adsorption unit operation.
A Uranium from its ore
B Water from petrol
C Ammonia from coke oven gas
D Mustard oil from mustard seed
With increase in the concentration of the adsorbate, the integral heat of adsorption
A Increases
B Decreases
C Remains unchanged
D May increase or decrease ; depends on the type of adsorbate
Freundlich equation applies to the adsorption of solute from
A Dilute solutions, over a small concentration range
B Gaseous solutions at high pressure
C Concentrated solutions
D None of these

Next steps