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प्रश्न
What happens when a beam of light is passed through a colloidal sol.
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उत्तर
- When a beam of light is passed through colloidal sol, it is observed that the colloidal particles scatter some of the incident light in all directions.
- Because of this scattering of light, the path of light through the colloidal dispersion becomes visible to an observer standing at right angles to its path, and the phenomenon is known as the Tyndall effect.
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संबंधित प्रश्न
Comment on the statement that “colloid is not a substance but a state of substance”.
Write one difference in Multimolecular colloid and Associated colloid
Define the following with a suitable example, of each:
Multimolecular colloid
Choose the correct option.
The size of colloidal particles lies between ______.
Identify the dispersed phase and dispersion medium in the following colloidal dispersions.
- milk
- blood
- printing ink
- fog
Write a note on Brownian motion.
Explain the term emulsion and types of emulsions.
Draw labelled diagram Tyndall effect.
Draw labelled diagram of Bredig’s arc method.
Froth and whipped cream are examples of ____________.
Which of the following is multimolecular colloid?
Mist is a colloidal solution of ____________.
Which of the following is an example of liquid-liquid system?
The precipitation power of an electrolyte increases with ______.
Maximum coagulation power is in ____________.
Which of the following is NOT true for lyophilic colloids?
Tyndall effect is observed due to ____________.
Pumice stone is an example of ______.
Which of the following compounds forms a colloidal solution when dissolved in water?
In which of the following sols there is low affinity between dispersed phase and dispersion medium?
Freshly prepared precipitate sometimes gets converted to colloidal solution by ______.
An emulsion cannot be broken by:
(i) heating
(ii) adding more amount of dispersion medium
(iii) freezing
(iv) adding emulsifying agent
Gelatin which is a peptide is added in icecreams. What can be its role?
Toluene is oxidised to benzoic acid by
Cloud is an example of
The coagulation of 200 ML of position sol took place when 0.73 HCL was added to its without changing the volume much. The flocculation value of HCL for the colloid is.
Which of the following substances will precipitate the negatively charge emulsion
Fog is a colloidal solution of ______.
The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following processes can explain this?
Identify the correct decreasing order of precipitation power of flocculating ion added, from following.
