Give reason for the following observations.
(b) We can get the smell of perfume sitting several metres
away.
Answer:
- Volatility: Perfumes contain volatile substances, meaning they evaporate quickly at room temperature.
- Diffusion: The perfume molecules mix with the air and spread in all directions due to diffusion.
- As these molecules reach our nose, we can detect the fragrance even from a distance.
- This is the same reason why we can smell food cooking from another room.