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Q. No.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%
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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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The correct statement regarding changes in the catalyst during a reaction is -
a. Physical
b. Qualitative
c. Chemical
d. Quantitative
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Subtopic: Catalyst |
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The correct statements regarding the situation, when a Lyophilic sol is added to a Lyophobic sol, are-
a. Lyophobic sol is protected
b. Lyophilic sol is protected
c. Film of lyophilic sol is formed over lyophobic sol
d. Film of lyophobic sol is formed over lyophilic sol
1. (a, b)
2. (b, c)
3. (c, a)
4. (a, d)
Subtopic: Lyophilic & Lyophobic Sol |
79%
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The correct statements among the following are :
| a. | Mixing two oppositely charged sols neutralizes their charges and stabilizes the colloid. |
| b. | The presence of equal and similar charges on colloidal particles provides stability to the colloids. |
| c. | Any amount of dispersed liquid can be added to the emulsion without destabilizing it. |
| d. | Brownian movement stabilizes sols. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
Subtopic: Emulsions |
52%
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The correct statements among the following about solid catalysts is -
| a. | Same reactants may give different products by using different catalysts |
| b. | Catalyst does not change ∆ H of reaction |
| c. | Catalyst is required in large quantities to catalyse reactions |
| d. | Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption |
1. a and b
2. b and c
3. c and d
4. a and d
Subtopic: Catalyst |
71%
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