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Q. No.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%
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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%
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The method of formation of the solution is given in Column I. Match it with the type of solution given in Column II.
| Column I | Column II |
| (A) Sulphur vapours passed through cold water | 1. Normal electrolyte solution |
| (B) Soap mixed with water above critical micelle concentration | 2. Molecular colloids |
| (C) White of egg whipped with water | 3. Associated colloid |
| (D) Soap mixed with water below critical micelle concentration | 4. Macromolecular colloids |
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: Colloidal Solution |
74%
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Incorrect statement regarding adsorption is:
| 1. | Adsorption is a surface phenomenon of accumulation of molecules of a substance at the surface rather than in the bulk of a solid or liquid. |
| 2. | Adsorption involves penetration through the surface to the bulk of the solid or liquid. |
| 3. | The substance that gets adsorbed is called the ‘adsorbate’ and the substance on whose surface the adsorption takes place is called the ‘adsorbent’. |
| 4. | During absorption, the substance gets uniformly distributed throughout the bulk of the solid or liquid. |
Subtopic: Adsorption and Absorption |
80%
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Why is a finely divided substance more effective as an adsorbent?
1. Small surface area.
2. Large surface area.
3. Weak molecular bonding.
4. Strong molecular bonding.
Subtopic: Adsorption and Absorption |
85%
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The factors that influence the adsorption of a gas on a solid is/are:
1. Nature of the gas.
2. Surface area of the solid.
3. Effect of pressure.
4. All of the above.
Subtopic: Adsorption and Absorption |
95%
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An adsorption isotherm is a plot between:
| 1. | The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant V. |
| 2. | The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant T. |
| 3. | The extent of absorption \(({x \over m})\) against the volume of gas (V) at constant P. |
| 4. | The extent of absorption \(({x \over m})\) against the pressure of gas (P) at constant T. |
Subtopic: Adsorption Isotherm |
81%
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Adsorbent can be activated by:
| 1. | Increasing the surface area of the adsorbent. |
| 2. | Breaking adsorbent into smaller pieces or powdering it. |
| 3. | Both (1) and (2) |
| 4. | None of the above. |
Subtopic: Adsorption and Absorption |
89%
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The probable reasons of the exothermic nature of adsorption is:
| 1. | Adsorption leads to a decrease in the residual forces on the surface of the adsorbent. |
| 2. | ∆S is negative. |
| 3. | Both (1) and (2) |
| 4. | None of the above. |
Subtopic: Adsorption and Absorption |
81%
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Which of the following statement is false?
| 1. | Adsorption is a reversible process and is accompanied by a decrease in pressure. |
| 2. | Adsorption decreases with an increase in pressure. |
| 3. | Adsorption is an exothermic process. |
| 4. | The magnitude of physisorption adsorption decreases with an increase in temperature. |
Subtopic: Adsorption and Absorption |
75%
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