Explain a sol & gel and how they can be inter converted.

A sol is a dispersion of very thin solid particles in a liquid. It has a liquid consistency and resembles a true solution. These particles are very small, but they are still enough large to obstruct the light and diffuse it. Examples honey and glue.
A gel is a colloidal solution in which a liquid is dispersed in a solid. it has gelatinous consistency Examples like jellies and jams.
By increasing the concentration of the particles, a sol can be passed to the state of gel. On the contrary, by diluting a gel, a sol is obtain.