Question

Give reason for the following observation :

We can get the smell of perfume sitting several meters away.

Answer 1

• A perfume is actually a mixture of number of pleasant smelling vapors.
• We can get the smell of perfume sitting several meters away due to diffusion. Vapours of perfume move rapidly in all directions and spread in the air by diffusion
• Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.