What is the size range of particles in a colloid? a) between 1 nm and 1000 nm b) between 1 nm and 10 nm c) between 100 nm and 1000 nm d) between 1000 nm and 2000 nm

a) between 1 nm and 1000 nm.

Explanation:

A colloid is formed of two phase. It is a system consisting of a continuous phase (the dispersion medium) and dispersed phase (the particles or emulsion droplets). In colloidal system, the particle size of the dispersed phase ranges from 1 nm to 1000 nm. Examples of colloidal dispersions include solid/liquid (suspensions), liquid/liquid (emulsions), and gas/liquid (foams).

So, the right choice is: a) between 1 nm and 1000 nm.