Question

The dimension of diffusion coefficient is given by

(a) M L T ^-2

(b) L ^2 T ^-1

(c) L T ^-1

(d) M L ^-2 T

I have been asked this question in an interview for internship.

The origin of the question is Fick’s Law-1 topic in section Modes and Diffusion of Mass Transfer

Answer 1

Right answer is (b) L ^2 T ^-1

The explanation is: Unit is m^2/s.