Question

a bottle of perfume is opened in a room the smell of its vapour spreads in the entire room name the property of gases which is responsible for this behaviour of perfume vapours

Answer 1

diffusion 

Explanation:

Diffusion is the spreading  - mixing of gases through molecular motion.

Answer 2

   A bottle of perfume is opened in a room, the smell of its vapour spreads in the entire room due to diffusion.

   Even if one opens a “bottle of perfume” in a “room”, we can “smell” it from a considerable distance.

   This is because the perfume gas moves from its high concentration areas to its low concentration area when the perfume bottle is opened and this process is called “diffusion”. This is the reason for getting the perfume smell from places far away.

Diffusion occurs in liquids and gases as their particles move from “place to place” randomly.