Related Questions

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
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.
A Greater than
B Lower than
C Is same as
D Half
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 difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?
A 4
B 8
C 16
D 24
The difference between the radio of bigger difference between circle and smaller circle is 14 and the difference between their sareas is 1056 cm2 . Radius of the smaller circle is .
A 7 cm
B 5 cm
C 9 cm
D 3 cm
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
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
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 a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will
A Increase
B Decrease
C Remain unchanged
D Either increase or decrease; depends on the coolant flow rate
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.
A Polyurathane
B Polysulphone
C Polycarbonate
D Polyester

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