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  • Which of the following statement(s) is/are true?  Option: 1 Colloidal solution does not show Tyndall effect.<div class='qna

Which of the following statement(s) is/are true?
 

Option: 1

Colloidal solution does not show Tyndall effect.


Option: 2

Colloidal solution show Brownian movement.


Option: 3

Colloidal solutions are not heterogeneous in nature.


Option: 4

Size of the colloidal particles is less than 1 nm.


Answers (1)

best_answer

Tyndall effect and Brownian movement are properties of colloidal solutions.

Tyndall effect:

If a strong beam of light is passed through a colloidal sol placed in dark place, path of the beam gets illuminated. This effect is called Tyndall effect.
This effect was first observed by faraday later studied in detail by Tyndall.
This effect arises due to scattering of light by colloidal particles in all directions. Thus, scattering of light illuminates the path of beam in the colloidal dispersion.

Brownian movement:
Under ultramicroscope colloidal particles appear to be in a continuous zig-zag motion known as Brownian movement. 

Colloidal solutions are heterogeneous. They have two phase system, dispersed phase and dispersion medium, there is a definite surface of separation between each particle of dispersed phase and the dispersion medium.

Size of the colloidal particle is between 1 nm and 1000 nm.

Hence option 2 is correct.

Posted by

manish

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