When a bottle of perfume is opened in a room we can smell it even from a considerable distance Why Class 9?

When  we  open  a  bottle  of  perfume  in  a  room,  we  can  smell  it  even  from  considerable  distance.  This  is  because,  when  the  perfume  is  opened,  that  gas  of  the  perfume  moves  from  its  areas  of  high  concentration  to  its  areas  of  low  concentration.  This  process  is  called  diffusion.  This  is  the  scientific  reason  behind  getting  the  smell  of  perfume  from  far  away  places.

because it is the property of gas , it expands fastly ..therefore we can smell it from a considerable distance.

gases are free to move they can move in any direction freely because they have larger inter molecular space between them.

 when we open a bottle of perfume then then the particles of the perfume rise up and diffuse with the particles in the atmosphere therefore it spreads very quicly eventually reaching our noses

First of all I want to tell you that the force of attraction between the particles are near about nude.  Thus they can move freely. the particles of perfume are move freely and by the diffusion process they move to thier lower concentration. thanks