Under what condition will diffusion take place most rapidly?

Question

a
movement through a permanent barrier
b
movement from an area of high concentration to an area of low concentration
c
movement against a concentration gradient
d
movement from an area of low concentration to high concentration

Answer 1

Diffusion will take place most rapidly under the condition of:

b) movement from an area of high concentration to an area of low concentration.

This is because diffusion is driven by the concentration gradient, with particles naturally moving from regions of higher concentration to regions of lower concentration until equilibrium is reached.