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Q. No.
Assertion (A):
0.1 M solution of glucose has the same decrement in the freezing point as 0.1 M solution of urea.
Reason (R):
Kf for both has the same value.
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: Depression of Freezing Point |
Level 3: 35%-60%
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Assertion(A): The molecular weight of acetic acid determined by depression in the freezing point method in benzene and water was found to be different.
Reason(R): Water is polar and benzene is non-polar.
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 and R is false.
4. A and R both are false.
Reason(R): Water is polar and benzene is non-polar.
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 and R is false.
4. A and R both are false.
Subtopic: Van’t Hoff Factor |
56%
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | When an ideal binary solution is in equilibrium with its vapour, the molar ratio of the two components in the solution and in the vapour phase may or may not be the same. |
| Reason (R): | The vapour pressure of a solution depends upon the vapour pressures of volatile components. |
| 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: Raoult's Law |
56%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Azeotropes have a different composition in liquid and vapour state. |
| Reason (R): | The composition in both the liquid and the vapour phase depends upon the volatility of the substance. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Azeotrope |
59%
Level 3: 35%-60%
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Match List-I with List-II:
| List-I (Types of Solutions) |
List-II (Common Examples) |
||
| A. | Gas in Gas | I. | Solution of hydrogen in palladium |
| B. | Solid in Gas | II. | Mixture of oxygen and nitrogen gas |
| C. | Gas in Liquid | III. | Camphor in nitrogen gas |
| D. | Gas in Solid | IV. | Oxygen dissolved in water |
| Options: | A | B | C | D |
| 1. | II | III | IV | I |
| 2. | II | I | IV | III |
| 3. | II | IV | III | I |
| 4. | II | IV | I | III |
Subtopic: Introduction & Colligative properties |
86%
Level 1: 80%+
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Given below are two statements:
In light of the above statements, choose the correct answer from the options given below:
| Statement I: | The mass of a gas dissolved in a given mass of a solvent at any temperature is proportional to the pressure of the gas above the solvent. |
| Statement II: | The rate of dissolution of sugar is equal to the rate of crystallization of sugar at equilibrium. |
In light of the above statements, choose the correct answer from the options given below:
| 1. | Both statement I and statement II are true. |
| 2. | Both statement I and statement II are false. |
| 3. | Statement I is true but statement II is false. |
| 4. | Statement I is false but statement II is false. |
Subtopic: Concentration Terms & Henry's Law |
82%
Level 1: 80%+
Hints
Match concentration expressions in List-I with uses in List-II and select the best match from the codes given:
| List-I (Concentration expression) |
List-II (Uses) |
||
| A. | Mass percentage | I. | Medicine |
| B. | Volume percentage | II. | Concentration of pollutants |
| C. | Mass by volume percentage |
III. | Industrial chemicals |
| D. | Parts per million | IV. | Liquid solutions |
| Options: | A | B | C | D |
| 1. | III | IV | II | I |
| 2. | III | II | IV | I |
| 3. | III | IV | I | II |
| 4. | III | I | II | IV |
Subtopic: Concentration Terms & Henry's Law |
78%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | The people living at high altitudes or climbers have a high concentration of oxygen in their blood and tissues. |
| Reason (R): | At high altitudes, the partial pressure of oxygen is less than that at the ground level. |
| 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 |
70%
Level 2: 60%+
Hints
Match the following physical constants in Column-I to their correct units given in Column-II:
Choose the correct code from the options given below:
| Column-I | Column-II | ||
| A. | Rate constant (k) of a second-order reaction | I. | m3mol-1 |
| B. | Cryoscopic constant (Kf) | II. | mol-1L s-1 |
| C. | Van der Waals constant (b) | III. | No units |
| D. | Compressibility factor (Z) | IV. | kg K mol-1 |
| Options: | (A) | (B) | (C) | (D) |
| 1. | II | IV | I | III |
| 2. | III | IV | II | I |
| 3. | II | III | IV | I |
| 4. | IV | I | II | III |
Subtopic: Depression of Freezing Point |
81%
Level 1: 80%+
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The solubility of potassium nitrate in water increases with temperature. A saturated solution of potassium nitrate at 80 °C is cooled to 25 °C in a closed container. Which of the following statements is/are correct?
| (A) | The mass of undissolved potassium nitrate will increase. |
| (B) | The concentration of the potassium nitrate solution remains the same. |
| (C) | The total mass of solvent present remains the same. |
| 1. | B and C only | 2. | A and C only |
| 3. | A only | 4. | B only |
Subtopic: Concentration Terms & Henry's Law |
63%
Level 2: 60%+
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