Advertisements
Advertisements
प्रश्न
Explain the term Tyndall effect.
Advertisements
उत्तर
When a beam of light is allowed to pass through a colloidal solution, it becomes visible like a column of light. This is known as the Tyndall effect. This phenomenon takes place as particles of colloidal dimensions scatter light in all directions.
संबंधित प्रश्न
Define the following terms: Associated colloids
Out of MgCl2 and AlCl3, which one is more effective in causing coagulation of negatively charged sol and why?
Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.
Explain what is observed when an electrolyte NaCl is added to hydrated ferric oxide sol.
Explain the term Electrophoresis
What happens when persistent dialysis of a colloidal solution is carried out?
Which of the following will show Tyndall effect?
Which of the following statements are correct?
(i) Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.
(ii) Presence of equal and similar charges on colloidal particles provides stability to the colloids.
(iii) Any amount of dispersed liquid can be added to emulsion without destabilising it.
(iv) Brownian movement stabilises sols.
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.
How does it become possible to cause artificial rain by spraying silver iodide on the clouds?
Tyndall effect is observed in
Which of the following is used for removing change on colloidal solution?
Gold number of protective colloids A, Band Dare 0.50, 0.01 and 0.10 and 0.005. The correct order of their protecting power is
The important factor in the stabilization of a colloidal solution is ______
Define coagulation.
What is electrophoresis?
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 ______.
Lyophilic sols are more stable than lyophobic sols because ______.
