Q. No.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
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 |
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.
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.
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. |
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. |
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. |
Enzymes are:
1. Biochemical catalysts.
2. Protein molecules of high molecular masses.
3. Both (1) and (2)
4. None of the above.
The phenomenon of the scattering of light by a colloidal solution known as:
1. Zeeman effect.
2. Tyndall effect.
3. Electrophoresis.
4. None of the above.
Heterogeneous catalysis is shown in:
| 1. | \(2SO_{2}{(g)} \ + \ O_{2}{(g)} \ \xrightarrow[]{Pt(s)} \ 2SO_{3}{(g)}\) |
| 2. | \(4NH_{3}{(g)} \ + \ 3H_{2}{(g)} \ \xrightarrow[]{Fe(s)} \ 2NH_{3}{(g)}\) |
| 3. | \(Vegetable \ oil(l) \ + \ H_{2}(g) \ \xrightarrow[]{Ni(s)} \ Vegetable \ ghee(s)\) |
| 4. | All of the above |
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