A. Penetration
B. Surface renewal
C. Film
D. None of these
Related Mcqs:
- Mass transfer co-efficient is directly proportional to DAB according to the _____________ theory?
A. Film
B. Penetration
C. Surface-renewal
D. None of these - Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?
A. Film
B. Penetration
C. Surface-renewal
D. None of these - According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) ?
A. D
B. D2
C. D0.5
D. 1/D - Mass transfer co-efficient varies as DAB 0.5, according to the _______________ theory?
A. Film
B. Surface renewal
C. Penetration
D. None of these - 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 - 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 - 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 - For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G) - 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 - Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?
A. Surface renewal
B. Film
C. Penetration
D. None of these
