Question

What phenomenon is involved when a perfume sprayed at one end of a room can be smelled at another end of a room?

• A. Attainment of equilibrium
• B. Diffusion
• C. Pressure equalization
• D. Respiration

Answer 1

Answer: (A), (B)

Diffusion

Initially, there is a high concentration of perfume molecules in the air at one end of the room and negligible concentration at another end of the room. So, the molecules move from the end with higher concentration to the other end for attainment of equilibrium. Movement of molecules from higher to lower concentration is called diffusion.