The information given below describes the properties of particles of a certain type of mixture.
1. The particles do not have fixed positions and are spread out quite uniformly.
2. The particles move freely and slide past one another
3. When a laser beam is passed through it, it clearly shows the path of the laser beam.
Which of the following shows the given properties?
Milk and water
A colloid is a mixture in which a substance, consisting of microscopically dispersed insoluble particles, is suspended throughout another substance.
The particles of a colloid are uniformly spread throughout the solution. Due to the relatively smaller size of particles, as compared to that of a suspension, the mixture appears to be homogeneous. But actually, a colloidal solution is a heterogeneous mixture, for example, milk. Because of the small size of colloidal particles, we cannot see them with naked eyes. But, these particles can easily scatter a beam of visible light. This scattering of a beam of light is called the Tyndall effect after the name of the scientist who discovered this effect.