Question

Why the smell of camphor spread in the room when it is burns

Answer 1

Due to diffusion. As these molecules are light in weight, air molecules grab and carry them in random motion which leads to the smell of camphor spread in the room when it is burns.

Answer 2

the reason behind the smell of camphor to spread is the process of diffusion. in the process of diffusion the molecules or the camphor move all across the room and it spreads the smell all over so we can smell the burning smell of the camphor.