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प्रश्न
Why is \[\ce{Fe(OH)3}\] colloid positively charged, when prepared by adding \[\ce{FeCl3}\] to hot water?
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उत्तर
The adsorption of positively charged \[\ce{Fe^{3+}}\] ions by the sol of hydrated ferric oxide results in positively charged colloid.
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संबंधित प्रश्न
Write a note on Brownian motion.
Explain Electrophoresis diagramatically.
Explain Bredig’s arc method.
Draw labelled diagram of Bredig’s arc method.
Identify the CORRECT statements from the following.
i. The colour of colloidal dispersion depends on size of colloidal particles.
ii. Tyndall effect is used to distinguish between colloidal dispersion and true solution.
iii. Eosin and congo red are examples of negatively charged sols.
Which of the following statements is CORRECT?
The precipitation power of an electrolyte increases with ______.
Pumice stone is an example of ______.
A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as ______.
An emulsion cannot be broken by:
(i) heating
(ii) adding more amount of dispersion medium
(iii) freezing
(iv) adding emulsifying agent
Which of the following substances will precipitate the negatively charged emulsions?
(i) \[\ce{KCl}\]
(ii) glucose
(iii) urea
(iv) \[\ce{NaCl}\]
How do emulsifying agents stabilise the emulsion?
How does the precipitation of colloidal smoke take place in Cottrell precipitator?
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.
The migration of dispersion medium under the influence of an electric potential is called ______.
In which of the following, the Tyndall effect is not observed?
Which of the following is most powerful to coagulate the negative colloid?
Identify positively charged sol from following.
