Question

what are porous solids? give one example.​

Answer 1

A porous medium or a porous material is a material containing pores (voids).The skeletal portion of the material is often called the "matrix" or "frame". The pores are typically filled with a fluid (liquid or gas). The skeletal material is usually a solid, but structures like foams are often also usefully analyzed using concept of porous media.

Answer 2

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Porous materials consist of a solid constituent intermingled with voids.

Eg: Soil