Question

The cause of Brownian movement is:

• A. Convection current.
• B. Heat changes in liquid state.
• C. Impact of molecules of dispersion medium on colloidal particles.
• D. Attractive forces between particles of the dispersed phase and dispersion medium.

Answer 1

The correct option is C Impact of molecules of dispersion medium on colloidal particles.

The cause of Brownian movement is impact of molecules of dispersion medium on colloidal particles. Brownian motion or pedesis is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid.