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. For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be ___________________?

    A. 1
    B. 0
    C. 2
    D. 3