Question

The main purpose of cascades is

(a) To get maximum conversion

(b) To  increase  mass transfer rates

(c) To get more efficiency

(d) None of the mentioned

The question was asked in an internship interview.

My doubt stems from Cascade Stages in section Interphase Mass Transfer of Mass Transfer

Answer 1

Right option is (b) To  increase  mass transfer rates

The best explanation: Though all the above mention is applicable, the main purpose is to increase the extent of mass transfer.