Question

Which of the following best describes Brownian motion?

• A. The colloidal particles in a fluid are seen to be moving in a random manner.
• B. The colloidal particles in a fluid are seen to be moving in a fixed pattern.
• C. The colloidal particles in a liquid are seen to be moving in a fixed pattern.
• D. The colloidal particles in a liquid are seen to be moving in a random manner.

Answer 1

The correct option is A

The colloidal particles in a fluid are seen to be moving in a random manner.

Brownian motion is defined as the continuous random movement of small particles suspended in a fluid medium (liquid or gas), which arises due to collisions with the fluid medium particles. An example of brownian motion is tea diffusing in water, the particles swirl in random directions.