13. The continuous zig-zag movement of colloidal particles in a dispersion medium is called?

Dispersion

Tyndall effect

Brownian movement

Oscillation

Dear student,
Since the rapid zig-zag movement of colloidal particles in dispersion medium was first noticed by Robert Brown, it is also called Brownian movement.
There are continuous collisions between the colloidal particles and molecules of dispersion medium which are in constant motion and passes kinetic energy to colloidal particles by striking it from all sides

Regards