give examples of when a solid diffuses into another solid
Diffusion is a word which we generally used for the gases.
For the solids generally we don't use this word.
An alloy is the mixture of two or more metals which are solids.
Give examples of diffusion of gas into solid
Explain why, the diffusion of a solid in another solid is a very slow process.
The molecules of solid have a high intermolecular force of attraction, even then the molecules don't diffuse into one another. Why?