Advertisements
Advertisements
प्रश्न
Explain Tyndall effect and Brownian movement with suitable diagram.
Advertisements
उत्तर
1. Tyndall Effect:
When a strong beam of light is focused on a colloidal solution the path of the beam becomes visible.
This phenomenon is called as Tyndall effect. The illuminated path is called Tyndall cone. This phenomenon is due to scattering of light by colloidal particles.
2. Brownian movement:
It is a kinetic property. When colloidal solution are viewed under powerful microscope, it can be seen that colloidal particles are moving constantly and rapidly in zig-zag directions. The Brownian movement of particles is due to the unbalanced bombardment of the particles by the molecules of dispersion medium.
APPEARS IN
संबंधित प्रश्न
Explain the following giving an example.
Colloid
Which of the following will show the “Tyndall effect”?
- Salt solution
- Milk
- Copper sulphate solution
- Starch solution
State whether the following statement is true or false :
Milk is a pure substance.
Name one metal and one non-metal which exist as liquids at room temperature.
Give two examples.
Colloid
Write scientific reason.
Constituent substances of a colloid cannot be separated by ordinary filtration.
State whether true or false. If false, correct the statement.
Liquid–liquid colloids are called gel.
The intensity of scattered light depends on the type of colloidal solution and the size of the colloidal particles.
A colloidal solution is a ______.
What are colloidal solutions?
