A. Thermal diffusivity/mass diffusivity
B. Thermal diffusivity/momentum diffusivity
C. Momentum diffusivity/mass diffusivity
D. Mass diffusivity/thermal diffusivity
Related Mcqs:
- At 750°K and 1 atm, the approximate value of Schmidt number for air is_________________?
A. 0.01
B. 0.1
C. 1
D. 10 - The Schmidt number which is defined as, μ/ρ D, is the ratio of the_____________________?
A. Momentum diffusivity to the mass diffusivity
B. Thermal diffusivity to the mass diffusivity
C. Momentum diffusivity to the thermal diffusivity
D. None of these - Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?
A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1 - Schmidt number is given by ___________________?
A. μ/ρDAB
B. Re × Pe
C. Sh × Pe
D. Re/Pe - If a two phase system is in physical equilibrium; then it means that, the_____________________?
A. Escaping tendency of each component from the liquid phase to the vapor phase is exactly
equal to that from vapor phase to liquid phase
B. Temperature of the liquid phase is equal to that of the vapor phase
C. Total pressure throughout the liquid phase is equal to that throughout the vapor phase
D. All A., B. and C. - Pick out the wrong statement. Generally for physical adsorption, a gas of________________?
A. Higher molecular weight is adsorbed in preference to a gas of low molecular weight
B. High critical temperature is adsorbed in preference to a gas of low critical temperature
C. Low volatility is adsorbed in preference to a gas of high volatility
D. None of these - 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 - 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 - Physical absorption is__________________?
A. An irreversible phenomenon
B. A reversible phenomenon
C. Accompanied by evolution of heat
D. Both B. and C. - The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is_____________________?
A. 0
B. ∞
C. -ve
D. +ve
