The diffusivity D. in a binary gas mixture is related to the pressure (P) as__________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is____________________

   A. 0
   B. 1
   C. 1

6. In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?

   A. P
   B. 1/P
   C. 1/√P
   D. √P

7. The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C ?

   A. 25
   B. > 25
   C. < 25
   D. – 25

8. The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C?

   A. 25
   B. > 25
   C. < 25
   D. – 25

9. The relative volatility of a binary mixture at constant temperature _________________ the total pressure?

   A. Decreases with increase in
   B. Increases with increase in
   C. Is independent of
   D. None of these

10. Relative volatility varies with the concentration of component for an ideal solution. The relative volatility of a binary mixture may be defined as the ratio of vapor pressure of component ‘A’ to that of component ‘B’, when_________________?

    A. Only vapor phase follows Raoult’s law
    B. Only liquid phase obeys Dalton’s law
    C. Liquid phase obeys Dalton’s law and vapor phase obeys Raoult’s law
    D. Vapor phase obeys Dalton’s law and liquid phase obeys Raoult’s law