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Q. No.Which of the following binary mixtures will have the same composition in the liquid and vapour phase?
(a)
Benzene-toluene
(b)
Water-nitric acid
(c)
Water-ethanol
(d)
n-Hexane-n-heptane
The correct choice among the given is-
1.
(a, b)
2.
(b, c)
3.
(c, d)
4.
(a, d)
Subtopic: Azeotrope |
Level 3: 35%-60%
Hints
The correct choice among the given regarding isotonic solutions is /are:
| (a) | Solute and solvent both are same |
| (b) | Osmotic pressure is same |
| (c) | Solute and solvent may or may not be same |
| (d) | Solute is always same solvent may be different |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Subtopic: Osmosis & Osmotic Pressure |
81%
Level 1: 80%+
Hints
For a binary ideal liquid solution, the curve that represents the variation in total vapor pressure versus composition of the solution is:
| a. |  |
b. |  |
| c. |  |
d. |  |
The correct option is:
1. a and b
2. b and c
3. c and d
4. a and d
Subtopic: Raoult's Law |
80%
Level 1: 80%+
Hints
Colligative properties are observed when:
| (a) | A non-volatile solid is dissolved in a volatile liquid |
| (b) | A non-volatile liquid is dissolved in another volatile liquid |
| (c) | A gas is dissolved in a non-volatile liquid |
| (d) | A volatile liquid is dissolved in another volatile liquid |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Subtopic: Introduction & Colligative properties |
74%
Level 2: 60%+
Hints
Match the laws/colligative properties given in Column-I with expressions given in Column-II.
| Column-I | Column-II | ||
| A. | Raoult’s law | I. | \(\mathrm{\pi=C R T}\) |
| B. | Osmotic pressure | II. | \(\Delta \mathrm{T}_{\mathrm{f}}=\mathrm{K}_{\mathrm{f}} \mathrm{~m}\) |
| C. | Elevation of boiling point | III. | \(\mathrm{p=x_1 p_1^0+x_2 p_2^0}\) |
| D. | Depression in freezing point | IV. | \(\Delta \mathrm{T}_{\mathrm{b}}=\mathrm{K}_{\mathrm{b}} \mathrm{~m}\) |
Codes:
| A | B | C | D | |
| 1. | I | III | IV | I |
| 2. | I | II | III | IV |
| 3. | I | IV | III | II |
| 4. | III | I | IV | II |
Subtopic: Elevation of Boiling Point | Depression of Freezing Point |
94%
Level 1: 80%+
Hints
Match the terms given in Column I with expressions given in Column II.
| Column I (Term) | Column II (Expression) |
| A. Mass percentage | 1. \(\text{Number of moles of the solute component} \over \text{Volume of solution in litres}\) |
| B. Volume percentage | 2. \(\text{Number of moles of the solute component} \over \text{Mass of solvent in kilograms}\) |
| C. Molarity | 3. \(\small{\text{Volume of the solute component in solution} \over \text{Total volume of solution}} \times 100\) |
| D. Molality | 4. \(\small{\text{Mass of the solute component in solution} \over \text{Total Mass of solution}} \times 100\) |
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: Concentration Terms & Henry's Law |
91%
Level 1: 80%+
Hints
Links
Select the correct option based on statements below:
| Assertion (A): | Molarity of a solution in liquid state changes with temperature. |
| Reason (R): | The volume of a solution changes with change in temperature. |
| 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: Concentration Terms & Henry's Law |
90%
Level 1: 80%+
Hints
Links
Select the correct option based on statements below:
| Assertion (A): | When methyl alcohol is added to water, boiling point of water increases. |
| Reason (R): | When a volatile solute is added to a volatile solvent, elevation in boiling point is observed. |
| 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. | Both (A) and (R) are False. |
Subtopic: Elevation of Boiling Point | Raoult's Law |
Level 3: 35%-60%
Hints
Select the correct option based on statements below:
| Assertion (A): | When NaCl is added to water a depression in freezing point is observed. |
| Reason (R): | The lowering of vapour pressure of a solution causes depression in the freezing point. |
| 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: Depression of Freezing Point |
74%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side. |
| Reason (R): | Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution. |
| 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: Osmosis & Osmotic Pressure |
59%
Level 3: 35%-60%
Hints
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