A. Differential heat of adsorption
B. Heat of wetting
C. Integral heat of adsorption
D. None of these
Related Mcqs:
- The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or “outgassed” adsorbent to from a definite concentration of adsorbate is called its_____________________?
A. Integral heat of adsorption
B. Heat of wetting
C. Differential heat of adsorption
D. Heat of normal condensation - At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially - H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?
A. 2.0
B. 1.56
C. 1.0
D. 0.56 - At equilibrium the concentration of water in vapour phase (C*) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is_________________?
A. 0.0
B. 0.2
C. 0.4
D. 1.0 - For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G) - The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are __________________?
A. Parallel
B. Straight
C. Both parallel and straight
D. Neither parallel nor straight - The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)_________________?
A. 500
B. 1200
C. 900
D. 800 - The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?
A. 500
B. 1200
C. 900
D. 800 - _____________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture ?
A. Dry bulb
B. Wet bulb
C. Dew point
D. None of these - Which of the following adsorbent is used to decolourise yellow glycerine ?
A. Silica gel
B. Alumina
C. Fuller’s earth
D. Activated carbon
