The intermixing of particles of two different substances on their own is called________________.
diffusion
Diffusion: The intermixing of particles of two different substances on their own.
For example, The particles of ink intermix on their own with the particles of water. The particles of ink get into the spaces between the particles of water. this intermixing is called diffusion.
The explanation for incorrect options:
Vaporisation: The process in which a liquid boils and changes to a gas is called vaporization.
Intermingling: Intermingling means mixing together.
Sublimation: The transition of the solid phase to the gaseous phase without passing the intermediate liquid phase is known as sublimation.
Hence, the correct option is B.