Question

What is the Brownian movement? In which of the following solutions Brownian movement is observed:

1. Dust particles suspended in the air
2. Sodium chloride solution

Answer 1

Brownian motion:

• The continuous random movement of particles of matter is known as Brownian motion.
• It was discovered by Robert Brown.
• This motion is a result of the multiple collisions of the particles with other moving particles in the medium.

The explanation for the correct option: Dust particles suspended in the air

• Dust particles moving randomly in the air are a good example that can exhibit the Brownian motion.

The explanation for the incorrect option: Sodium chloride solution

• This is an example of a true solution
• In sodium chloride solution particles of solute are not moving randomly.
• so it does not show the Brownian movement.

Thus, Brownian movement is observed in dust particles suspended in the air.