The correct option among the following is :

  • Option 1)

    Colloidal medicines are more effective because they have small surface area.

  • Option 2)

    Addition of alum to water makes it unfit for drinking .

  • Option 3)

    Colloidal particles in lyophobic sols can be precipitated by electrophoresis.

  • Option 4)

     Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.

Answers (1)

 

 

Properties of Colloidal Solutions -

Coagulation or Precipitation

- wherein

The stability of the lyophobic sols is due to the presence of charge on colloidal particles. If somehow the charge is removed the particles will come nearer to each other and settle down under gravity.

 

 

 

Properties of Colloidal Solutions -

Electrophoresis

- wherein

The existance of charge on colloidal particles is confirmed by electrophoresis experiment. The movement of colloidal particles under an applied electric potential is called electrophoresis.

 

 

(1) Colloidal medicines are more effective because they have large surface area.

(2) Addition of alum to water makes it suitable for drinking.

(3) Colloidal particles in lyophobic sols can be ppt by electrophoresis.

 (4) Brownian motion in colloidal particles depends on the size of particles.


Option 1)

Colloidal medicines are more effective because they have small surface area.

Option 2)

Addition of alum to water makes it unfit for drinking .

Option 3)

Colloidal particles in lyophobic sols can be precipitated by electrophoresis.

Option 4)

 Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.

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