Question

For a Steady state diffusion of A through Non- diffusing B. N flux of B= ______

(a) 0

(b) 1

(c) 2

(d) Infinity

This question was addressed to me in unit test.

My question is taken from Molecular Diffusion in Gas in chapter Diffusion in Solids and Molecular Diffusion in Fluids of Mass Transfer

Answer 1

Right choice is (a) 0

For explanation I would say: Non- diffusing B means N flux of B = 0.