Advertisements
Advertisements
प्रश्न
Distinguish between lyophobic and lyophilic sols.
What are the main points of difference between lyophilic and lyophobic sols?
Advertisements
उत्तर
| Sr. No. | Points | Lyophobic sols | Lyophilic sols |
| 1. | Method of formation | Lyophobic sols are formed only by special methods. | Lyophilic sols are formed easily by direct mixing. |
| 2. | Reversibility | They are irreversible. | They are reversible. |
| 3. | Stability | These are unstable and hence, require traces of stabilizers. | These are self-stabilized. |
| 4. | Effect of electrolytes | The addition of a small amount of electrolytes causes precipitation or coagulation of lyophobic sols. | The addition of a large amount of electrolytes causes precipitation or coagulation of lyophilic sols. |
| 5. | Viscosity | The viscosity of lyophobic sol is nearly the same as the dispersion medium. | The viscosity of lyophilic sol is much higher than that of the dispersion medium. |
| 6. | Surface tension | The surface tension of lyophobic sol is nearly the same as the dispersion medium. | The surface tension of lyophilic sol is lower than that of the dispersion medium. |
APPEARS IN
संबंधित प्रश्न
Write one difference in Multimolecular colloid and Associated colloid
Define the following with a suitable example, of each:
Multimolecular colloid
Write a note on Brownian motion.
What are the applications of Electrophoresis?
Explain the term emulsion and types of emulsions.
Which one of the following methods is used to make platinum sol?
Mist is a colloidal solution of ____________.
Which of the following statements is CORRECT?
The order of coagulating power of following ions in the coagulation of a positive sol is:
i. \[\ce{PO^{3-}_4}\]
ii. \[\ce{SO^{2-}_4}\]
iii. \[\ce{[Fe(CN)6]^{4-}}\]
iv. \[\ce{NO^-_3}\]
Which of the following is NOT true for lyophilic colloids?
Smoke is an example of ____________.
Which of the following can form colloidal sol with water?
The movement of colloidal particles towards respective electrode under electric field is called ______.
Pumice stone is an example of ______.
Which of the following compounds forms a colloidal solution when dissolved in water?
Which of the following electrolytes will have maximum coagulating value for AgI/Ag+ solution?
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?
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 |
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?
The migration of dispersion medium under the influence of an electric potential is called ______.
Which of the following is most powerful to coagulate the negative colloid?
Blood may be purified by ______.
Van Arkel's method of purification of metals involves converting the metal to a ______.
Starch is an example of which of the following type of colloid?
Identify positively charged sol from following.
