Question

The continuous random motion of colloidal particles is called:

• A. Brownian movement
• B. Zig zag movement
• C. Continuous movement
• D. Tyndall effect

Hint:

Brownian motion is observed in colloidal solutions and explains the erratic movement of particles in the solution.

Answer 1

The Correct Option is A

The continuous random motion of colloidal particles is called: 

• Option 1: Brownian movement - This is the correct answer. Brownian motion refers to the random, continuous movement of colloidal particles due to collisions with molecules of the surrounding medium (such as water). This motion is a characteristic feature of colloidal systems.
• Option 2: Zig zag movement - This term describes a type of movement but does not specifically refer to the random motion of colloidal particles.
• Option 3: Continuous movement - While colloidal particles do exhibit continuous movement, the specific name for their random motion is Brownian motion, not just "continuous movement."
• Option 4: Tyndall effect - This is not a type of motion but refers to the scattering of light by colloidal particles, which makes the path of the light visible. It is unrelated to the random motion of the particles themselves.

Explanation:

The continuous random motion of colloidal particles is called Brownian movement, named after the botanist Robert Brown who first observed this phenomenon. The movement results from the constant bombardment of colloidal particles by the molecules of the surrounding medium, such as water.