A. Packed tower
B. Bubble-cap plate column
C. Sieve-plate column
D. Wetted wall column
A. Diffusion co-efficient
B. Mass transfer co-efficient
C. NTU
D. None of these
A. Schmidt number
B. Sherwood number
C. Lewis relationship
D. Froude number
A. Interfacial surface between liquid and gas phase should be large
B. Time of contact between the two phases should be less
C. Gas velocity should be very low
D. Liquid entrainment should be severe
A. No change in theoretical
B. Marginal decrease in the number of
C. Major decrease in the number of
D. None of these
A. Sc × Pr
B. Pr × St
C. Sh × Pr
D. St × Sh
A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided
A. Molal
B. Relative
C. Percentage
D. None of these
A. Providing irregular grain size
B. Providing minimum percentage of voids
C. Having maximum possible points of contact
D. None of these
A. Centrifugal extractor
B. Pachuca tanks
C. Bollman extractor
D. None of these