A. 1
B. 1 to 5
C. 5 to 10
D. > 10
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 - Liquid diffusivity is of the order of _______________ cm2 /second?
A. 0.01
B. 0.1
C. 10-5 to 10-6
D. > 1 - 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 - 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 - The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is _____________________?
A. D/a
B. D/2a
C. Proportional to √D
D. Dependent on the Reynolds number - 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 pressure (P) as___________________?
A. D ∝ P0.5
B. D ∝ 1/P0.5
C. D ∝ 1/P
D. D ∝ 1/P1.5 - The diffusivity D. in a binary gas mixture is related to the pressure (P) as__________________?
A. D ∝ P0.5
B. D ∝ 1/P0.5
C. D ∝ 1/P
D. D ∝ 1/P1.5 - In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?
A. P
B. 1/P
C. 1/√P
D. √P
