A. Molecular velocity only
B. Pore radius of the catalyst only
C. Molecular mean free path only
D. Molecular velocity and pore radius of the catalyst
Related Mcqs:
- The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?
A. √T
B. T2
C. T
D. T4 - The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = _________________?
A. 1
B. 0.5
C. 10
D. 0 - The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of________________?
A. Newtonian liquids
B. Non-Newtonian liquids
C. Ideal gases
D. Real gases - If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is____________________
A. 0
B. 1
C. 1 - In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the__________________?
A. Temperature and pressure
B. Concentration
C. Nature of the constituents
D. None of these - For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?
A. Increases
B. Decreases
C. Remain same
D. Either A. or B.; depends on the gas - Dimension of mass diffusivity is the same as that of_____________________?
A. Kinematic viscosity
B. Dynamic viscosity
C. Surface tension
D. Pressure - Mass transfer co-efficient ‘K’ according to penetration theory varies with mass diffusivity as____________________?
A. D0.5
B. D
C. 1/D
D. D1.5 - In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________?
A. T
B. √T
C. T2
D. 1/T - The diffusivity D. in a binary gas mixture is related to the temperature (T) as________________________?
A. D ∝ T
B. D ∝ T0.5
C. D ∝ T1.5
D. D ∝ T2
