The number of colloidal systems from the following, which will have...

The phase that is scattered or present in the form of colloidal particles is called dispersed phase and the medium in which the colloidal particles are dispersed is called the dispersion medium.

Coloured gemstones are solid sols, colloids in which solid particles are dispersed in solid medium. In paints, small amount of solid pigments are dispersed in a large amount of liquid solvent. So, it is an example of a solid in liquid mixture. Smoke is a solid aerosol-type colloid consisting of the solid dispersed phase in the gaseous dispersed medium. Cheese is an example of gel in the colloidal systems, in which the dispersed phase is a liquid while the dispersion medium is a solid. Milk is a type of 'liquid in liquid' colloid, also known as emulsion. Hair cream is an example of a colloidal system where dispersed Phase is Liquid and dispersion Medium is also Liquid. Insecticide sprays is an example of a colloidal solution in which liquid particles are dispersed in the gaseous phase. Froth is a colloidal solution of gas in liquid. Soap lather is an example of colloidal system foam in which the dispersed phase is gas and the dispersion medium is liquid.

Paints, milk, froth, soap lather and hair cream have liquid as dispersion medium.