According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) ?

Related Mcqs:

1. 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...

2. Mass transfer co-efficient ‘K’ according to penetration theory varies with mass diffusivity as____________________?

   A. D0.5 B. D C. 1/D D. D1.5...

3. 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...

4. Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as____________________?

   A. K ∝D B. K ∝√D C. K ∝D1.5 D. K ∝D2...

5. JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by___________________?

   A. Nsh = 2 B. Nst = 2 C. Nsc = 2 D. None of these...

6. Mass transfer co-efficient is directly proportional to DAB according to the _____________ theory?

   A. Film B. Penetration C. Surface-renewal D. None of these...

7. Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?

   A. Film B. Penetration C. Surface-renewal D. None of these...

8. Mass transfer co-efficient is directly proportional to DAB 0.5, according to ________________ theory ?

   A. Penetration B. Surface renewal C. Film D. None of these...

9. For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is___________________?

   A. Calculated B. Unknown C. Known D. Not required...

10. The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is_______________________?

    A. 100 B. 10 C. 5 D. 1...