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प्रश्न
Explain the terms Coagulation
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उत्तर
Coagulation: The process of settling down of colloidal particles i.e., conversion of a colloid into a precipitate is called coagulation.
संबंधित प्रश्न
What is the reason for the stability of colloidal sols?
Define the following term:
Zeta potential
Define the following terms: Associated colloids
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
What modification can you suggest in the Hardy-Schulze law?
What happens when a freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
What happens when persistent dialysis of a colloidal solution is carried out?
A colloidal sol is prepared by the given method in the figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the sol represented?
Assertion: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles.
Reason: Pore size of the filter paper becomes more than the size of colloidal particle.
Assertion: Colloidal solutions show colligative properties.
Reason: Colloidal particles are large in size.
Assertion: Coagulation power of Al3+ is more than Na+.
Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy Schulze rule).
What is common in aqua sols and solid aerosols? How do they differ?
What is Gold number?
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 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:
Lyophilic sols are more stable than lyophobic sols because ______.
