Related Questions

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
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
The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of
A Normal condensation
B Wetting
C Sum of A and B
D Difference of A and B
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
How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
A miu = miuR
B miu>miuR
C miu
D none of these
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
A Surrounding temperature
B Average temperature of the fin
C Temperature of the fin end
D Constant temperature equal to that of the base
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
__________ is the physical surroundings or the physical facility where the service is produced, delivered and consumed.
A Servicespace
B Servicescape
C Serviceplace
D Servicescope
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

Next steps