Question

why does the fragrance of an incense sticks spread in the whole room​

Answer 1

Answer:

This is because the particles in gases move very quickly in all directions. Example. When we light an incense stick (agarbatti) in a corner of our room, its fragrance spreads in the whole room very quickly. The fragrance of burning incense stick spreads all around due to the diffusion of its smoke into the air.

Answer 2

Answer:

Because of the property of gases

As fragrance is in gas state it spreads