A student sitting on the back row opened a bottle of foul-smelling perfume and dabbed it on her wrists.One by one (beginning from the back of the room)the students began to cough due to the foul smell.This phenomena was due to
A)osmosis.
B)molecules moving from an area of low concentration to high concentration.
C)an allergic reaction.
D)diffusion.
E)active transport.

Question

Quizplus · Accepted Answer

This phenomenon is due to diffusion, which is the movement of molecules from an area of high concentration to an area of low concentration. In this case, the perfume molecules were concentrated in the area where the student applied it, and diffused outwards to areas of lower concentration, causing the foul smell and subsequent coughing of the other students.

A Student Sitting on the Back Row Opened a Bottle