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Q. No.Method by which lyophobic sol can be protected.
1. By addition of oppositely charged sol.
2. By addition of an electrolyte.
3. By addition of lyophilic sol.
4. By boiling.
Subtopic: Lyophilic & Lyophobic Sol |
74%
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Freshly prepared precipitate sometimes gets converted to colloidal solution by ......
1. Coagulation
2. Electrolysis
3. Diffusion
4. Peptisation
Subtopic: Colloidal Solution |
75%
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The electrolytes with maximum coagulating value for Ag/Ag+ sol is:
1. Na2S
2. Na3PO4
3. Na2SO4
4. NaCl
Subtopic: Colloidal Solution |
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Which of the following phenomenon occurs when a chalk stick is dipped in ink?
a. Adsorption of coloured substance
b. Adsorption of solvent
c. Absorption and adsorption both of solvent
d. Absorption of solvent
The correct choice among the given is -
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Subtopic: Adsorption and Absorption |
58%
From NCERT
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Match the types of colloidal systems given in Column I with the names given in Column II.
| Column I | Column II |
| A. Solid in Liquid | 1. Foam |
| B. Liquid in solid | 2. Sol |
| C. Liquid in Liquid | 3. Gel |
| D. Gas in Liquid | 4. Emulsion |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Emulsions |
90%
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Select the correct option based on statements below:
| Assertion (A): | An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles. |
| Reason (R): | The pore size of the filter paper becomes larger than the size of the colloidal particle. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Colloidal Solution |
60%
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Select the correct option based on statements below:
| Assertion (A): | Colloidal solutions do not show Brownian motion. |
| Reason (R): | Brownian motion is responsible for the stability of sols. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Colloidal Solution |
79%
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Select the correct option based on statements below:
| Assertion (A): | The coagulation power of Al3+ is more than Na+. |
| Reason (R): | Greater the valency of the flocculating ion added, the greater is its power to cause precipitation (Hardy-Schulze rule) |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Colloidal Solution |
90%
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Select the correct option based on statements below:
| Assertion (A): | Detergents with low CMC are more economical to use. |
| Reason (R): | The cleansing action of detergents involves the formation of micelles. These are formed when the concentration of detergents becomes equal to CMC. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Colloidal Solution |
62%
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Match the items in Column I and Column II.
| Column I | Column II |
| A. Dialysis | 1. Cleansing action of soap |
| B. Peptization | 2. Coagulation |
| C. Emulsification | 3. Colloidal sol formation |
| D. Electrophoresis | 4. Purification |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Colloidal Solution | Emulsions |
83%
From NCERT
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