Although velocity of air molecules is very fast

cbse
kinetictheoryofgases

#1

Although velocity of air molecules is very fast but fragnance of a perfume spreads at a much slower rate, explain?


#2

This is because scent vapour molecules do not travel uninterrupted, they undergo a number of collisions and trace a zig-zag path, due to which their effective displacement per unit time is low so spreading is at a much slower rate.