Q. The intermixing of particles of two different types of matter on their own is called?

[A] Fusion

[B] Fission

[C] Diffusion

[D] Cracking

Answer: C
Notes:

Explanation: The particles of matter intermix on their own with each other. They do so by getting into the spaces between the particles. This intermixing of particles of two different types of matter on their own is called diffusion.

Source: Science NCERT 9th Class