Advertisements
Advertisements
प्रश्न
Define the following terms: Associated colloids
Advertisements
उत्तर
Substances which at low concentrations behave as normal strong electrolytes but at higher concentrations exhibit colloidal behaviour because of the formation of aggregates or micelles are known as associated colloids.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following observations: Leather gets hardened after tanning.
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.
Assertion: Colloidal solutions do not show brownian motion.
Reason: Brownian motion is responsible for stability of sols.
Give reason for the following:
Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.
Tyndall effect is observed in
Gold number is associated with:-
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
Define coagulation.
Define the following term:
Coagulation
The conditions given below are in the context of observing Tyndall effect in colloidal solutions:
- The diameter of the colloidal particles is comparable to the wavelength of light used.
- The diameter of the colloidal particles is much smaller than the wavelength of light used.
- The diameter of the colloidal particles is much larger than the wavelength of light used.
- The refractive indices of the dispersed phase and the dispersion medium are comparable.
- The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below:
