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प्रश्न
Draw labelled diagram Tyndall effect.
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उत्तर
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संबंधित प्रश्न
Comment on the statement that “colloid is not a substance but a state of substance”.
Define the following with a suitable example, of each:
Gel
Distinguish between lyophobic and lyophilic sols.
Explain Bredig’s arc method.
Explain micelle formation in a soap solution.
Which type of colloid is formed on the dissolution of soap in water?
Froth and whipped cream are examples of ____________.
Which of the following is a heterogeneous mixture?
Mixing of two oppositely charged sols leads to ____________.
Which of the following compounds forms a colloidal solution when dissolved in water?
Which of the following ionic species has highest precipitating power?
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
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?
Why are some medicines more effective in the colloidal form?
Why does bleeding stop by rubbing moist alum?
Toluene is oxidised to benzoic acid by
For coagulating 200 ml of arsenious sulphide sol, 10 ml of 1 m NaCl solution is required find out the flocculation value of NaCl.
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?
Van Arkel's method of purification of metals involves converting the metal to a ______.
Identify positively charged sol from following.
