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प्रश्न
Why does bleeding stop by rubbing moist alum?
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उत्तर
Blood is a colloidal solution when we rub moist alum on that part it causes coagulation which stops bleeding.
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संबंधित प्रश्न
Comment on the statement that “colloid is not a substance but a state of substance”.
Explain Electrophoresis diagramatically.
What are the applications of Electrophoresis?
Draw labelled diagram of Bredig’s arc method.
In coagulation of positively charged ferric hydroxide sol, the most and least effective ions are ____________ and ____________ respectively.
Smoke is an example of ____________.
Froth is a colloidal solution of ____________.
Tyndall effect is useful ______.
Pumice stone is an example of ______.
Freshly prepared precipitate sometimes gets converted to colloidal solution by ______.
Which of the following substances will precipitate the negatively charged emulsions?
(i) \[\ce{KCl}\]
(ii) glucose
(iii) urea
(iv) \[\ce{NaCl}\]
Gelatin which is a peptide is added in icecreams. What can be its role?
What is collodion?
A colloid is formed by adding \[\ce{FeCl3}\] in excess of hot water. What will happen if excess sodium chloride is added to this colloid?
How does the precipitation of colloidal smoke take place in Cottrell precipitator?
Match the items of Column I and Column II.
| Column I | Column II |
| (i) Butter | (a) dispersion of liquid in liquid |
| (ii) Pumice stone | (b) dispersion of solid in liquid |
| (iii) Milk | (c) dispersion of gas in solid |
| (iv) Paints | (d) dispersion of liquid in solid |
Which of the following substances will precipitate the negatively charge emulsion
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 electrolytes will be most effective in coagulating negative sol?
