Question

why when perfume bottle is open in a room the smell spread in entire room​

Answer 1

Answer:

Because perfume molecules are continuously moving due to weak intermolecular force of attraction Hence when the bottle is open molecules spread throughout the room causing smell in the entire room

Answer 2

Answer:

The particles of the smell of perfume mix with the particles of air . So when we open the perfume bottle in room , the smell spread in entire room. OR because of diffusion.