Question

Explain whether smoke filling up a room is diffusion or not

Answer 1

Yes! "Diffusion is the process in which gas, through random movement of particles, tends to fill up the whole volume of the container in which it is placed. So a similar process would lead the smoke, which is in form of gas (or light particles), to fill in the whole room in which it is contained" -W.C.

Answer 2

The answer is yes and read ^ (I was gonna say the same,but wow great explanation)