Advertisements
Advertisements
प्रश्न
Explain what is observed when a beam of light is passed through a colloidal sol.
Explain the observation likely to be made when a beam of light is allowed to pass through a colloidal solution.
Advertisements
उत्तर
When a beam of light is passed through a colloidal solution, then scattering of light is observed. This is known as the Tyndall effect. This scattering of light illuminates the path of the beam in the colloidal solution.
संबंधित प्रश्न
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
Out of MgCl2 and AlCl3, which one is more effective in causing coagulation of negatively charged sol and why?
Define the following term : Brownian movement
Explain what is observed when an electrolyte NaCl is added to hydrated ferric oxide sol.
Explain the term Electrophoresis
Explain the terms Dialysis
Answer the following question.
Why are medicines more effective in the colloidal state?
Which of the following will show Tyndall effect?
What happens when a lyophilic sol is added to a lyophobic sol?
(i) Lyophobic sol is protected.
(ii) Lyophilic sol is protected.
(iii) Film of lyophilic sol is formed over lyophobic sol.
(iv) Film of lyophobic sol is formed over lyophilic sol.
Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented?
(i) Reverse osmosis takes place.
(ii) Electroosmosis takes place.
(iii) Dispersion medium begins to move.
(iv) Dispersion medium becomes stationary.
What causes brownian motion in colloidal dispersion?
Assertion: Colloidal solutions show colligative properties.
Reason: Colloidal particles are large in size.
Assertion: Colloidal solutions do not show brownian motion.
Reason: Brownian motion is responsible for stability of sols.
What is Gold number?
Which of the following is used for removing change on colloidal solution?
The right option for the statement “Tyndall effect is exhibited by”, is:
Define the following term:
Coagulation
6.84 g Al2(SO4)3 is needed to coagulate 2.5 L of As2S3 sol completely in 2.0 hrs. The coagulation value of Al2 (SO4)3 is ______.
