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Q. No.Given below are two statements:
Statement I:
In the coagulation of a negative sol, the flocculating power of the three given ions is in the order Al3+ > Ba2+ > Na+
Statement II:
In the coagulation of a positive sol, the flocculating power of the three given salts is in the order NaCl > Na2SO4 > Na3PO4
In the light of the above statements, choose the most appropriate answer from the options given below:
1.
I is incorrect but II is correct.
2.
Both I and II are correct.
3.
Both I and II are incorrect.
4.
I is correct but II is incorrect.
Subtopic: Colloidal Solution |
66%
Level 2: 60%+
NEET - 2022
Hints
Given below are two statements:
| Assertion (A): | Powdered substances are more effective adsorbents than their crystalline forms |
| Reason (R): | Powdered substance has more surface area and the extent of adsorption increases with the increase of the surface area of the adsorbent. |
| 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: Adsorption and Absorption |
94%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | Physisorption decrease with the increase in temperature. |
| Reason (R): | Physisorption is exothermic in nature. |
| 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: Adsorption and Absorption |
69%
Level 2: 60%+
Hints
Subtopic: Adsorption Isotherm |
91%
Level 1: 80%+
Hints
Links
Consider the following graph between (extent of adsorption) and pressure:
What is the correct relation between T1, T2, and T3?
1. T3 < T2 > T1
2. T1 < T2 < T3
3. T1 > T2 > T3
4. None of the above
Subtopic: Adsorption Isotherm |
68%
Level 2: 60%+
Hints
Match the items given in Column I and Column II.
| Column I | Column II |
| A. Protective colloid | 1. FeCl3 + NaOH |
| B. Liquid-liquid colloid | 2. Lyophilic colloids |
| C. Positively charged colloid | 3. Emulsion |
| D. Negatively charged colloid | 4. FeCl3 + hot water |
Codes
| A | B | C | D | |
| 1. | 3 | 2 | 4 | 1 |
| 2. | 1 | 4 | 3 | 2 |
| 3. | 2 | 3 | 4 | 1 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Emulsions |
89%
Level 1: 80%+
Hints
Match the statement given in Column I with the phenomenon given in Column II.
| Column I | Column II |
| A. Dispersion medium moves in an electric field | 1. Osmosis |
| B. Solvent molecules pass through a semi-permeable membrane towards the solvent side | 2. Electrophoresis |
| C. Movement of charged colloidal particles under the influence of applied electric potential towards oppositely charged electrodes | 3. Electroosmosis |
| D. Solvent molecules pass through semi-permeable membranes towards the solution side | 4. Reverse osmosis |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 3 | 4 | 2 | 1 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Colloidal Solution |
68%
Level 2: 60%+
Hints
Match the items of Column I and Column II.
|
Column I |
Column II |
|
A. Whipped cream B. Pumice stone C. Milk D. Paints |
1. Dispersion of liquid in liquid 2. Dispersion of solid in liquid 3. Dispersion of gas in solid 4. Dispersion of gas in liquid |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Colloidal Solution |
86%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 2: 60%+
Hints
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