The dimension of diffusivity is same as that of the
A. Density
B. Molal concentration
C. Kinematic viscosity
D. Velocity head
Related Mcqs:
- 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 - Dimension of mass diffusivity is the same as that of_____________________?
A. Kinematic viscosity
B. Dynamic viscosity
C. Surface tension
D. Pressure - Which of the following has the same dimension as mass diffusivity ?
A. Momentum flux
B. Kinematic viscosity
C. Thermal diffusivity
D. Both B. and C. - 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 - The Knudsen diffusivity is proportional to (where, T = absolute temperature) ______________________?
A. √T
B. T2
C. T
D. T4 - Mass transfer co-efficient (K) and diffusivity D. are related according to film theory as______________________?
A. K ∝ D
B. K ∝√D
C. K ∝ D1.5
D. K ∝ D2 - The Knudsen diffusivity is dependent on the ______________________?
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 - The binary diffusivity in gases at atmospheric conditions is about ___________________?
A. 10-9 cm/sec
B. 10-1 cm2/sec
C. 10-3 sec/cm
D. 10-4 cm2/sec2
