A. Temperature and pressure
B. Concentration
C. Nature of the constituents
D. None of these
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 - In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________?
A. T
B. √T
C. T2
D. 1/T - In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?
A. P
B. 1/P
C. 1/√P
D. √P - The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is___________________?
A. 2.09 × 10-4
B. 2.09 × 10-5
C. 2.09 × 10-9
D. 2.09 × 10-12 - The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force) ?
A. Kc = Kp = Km
B. Kc = Kp/RT = Km . RT/P
C. Kc = Kp . RT = Km . RT/p
D. None of these - Ordinary diffusion process is also called ______________ diffusion?
A. Pressure
B. Thermal
C. Concentration
D. Forced - If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is____________________
A. 0
B. 1
C. 1 - If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?
A. The system comprises of partially miscible liquids
B. The system comprises of miscible liquids
C. The system comprises of an azeotrope
D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear - 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