Question

Find the driving force at the point (P) in the equilibrium distribution curve given below.

(a) Zero

(b) Infinity

(c) One

(d) Greater than one

I got this question in an interview for job.

I want to ask this question from Material Balance Concepts-Counter Current topic in chapter Interphase Mass Transfer of Mass Transfer

Answer 1

Correct answer is (a) Zero

The explanation: Here, the operating line touches the equilibrium line the mass transfer rates becomes zero. So the driving force will be zero at the point P.