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Q. No.Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R):
Assertion (A):
Helium is used to dilute oxygen in the diving apparatus.
Reason (R):
Helium has a high solubility in O2.
In light of the above statements, choose the correct answer from the options given below:
1.
(A) is False but (R) is True.
2.
Both (A) and (R) are True and (R) is the correct explanation of (A).
3.
Both (A) and (R) are True and (R) is not the correct explanation of (A).
4.
(A) is True but (R) is False.
Subtopic: Concentration Terms & Henry's Law |
51%
Level 3: 35%-60%
NEET - 2023
Hints
Which of the following aqueous solutions of electrolytes will exhibit the least elevation in boiling point?
| 1. | 0.05 M NaCl | 2. | 0.1 M KCl |
| 3. | 0.1 M MgSO4 | 4. | 0.1 M NaCl |
Subtopic: Van’t Hoff Factor |
77%
Level 2: 60%+
NEET - 2023
Hints
KH value for some gases at the same temperature 'T' are given:
KH is Henry's Law constant in water. The order of their solubility in water is :
| gas | KH/k bar |
| Ar | 40.3 |
| CO2 | 1.67 |
| HCHO | 1.83 × 10–5 |
| CH4 | 0.413 |
| 1. | Ar < CO2 < CH4 < HCHO |
| 2. | Ar < CH4 < CO2 < HCHO |
| 3. | HCHO < CO2 < CH4 < Ar |
| 4. | HCHO < CH4 < CO2 < Ar |
Subtopic: Concentration Terms & Henry's Law |
77%
Level 2: 60%+
NEET - 2022
Hints
One mole of sugar is dissolved in three moles of water at 298 K. The relative lowering of vapour pressure is:
| 1. | 0.25 | 2. | 0.15 |
| 3. | 0.50 | 4. | 0.33 |
Subtopic: Relative Lowering of Vapour Pressure |
76%
Level 2: 60%+
NEET - 2022
Hints
Which of the following contains 0.5 moles of a solute in one molal solution?
| 1. | 1000 g of solvent | 2. | 500 mL of solvent |
| 3. | 500 g of solvent | 4. | 100 mL of solvent |
Subtopic: Concentration Terms & Henry's Law |
74%
Level 2: 60%+
NEET - 2022
Hints
Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH2CONH2) is dissolved in 850 g of water.
The vapour pressure of water (in mm Hg) for this solution is :
The vapour pressure of water (in mm Hg) for this solution is :
| 1. | 23.40 | 2. | 0.23 |
| 3. | 12.87 | 4. | 40.14 |
Subtopic: Raoult's Law |
67%
Level 2: 60%+
Hints
The Henry's law constant KH values of three gases (A, B, C) in water are 145, 2 × 10–5, and 35 kbar, respectively. Determine the order of solubility of these gases in water from highest to lowest:
| 1. | B > C > A | 2. | A > C > B |
| 3. | A > B > C | 4. | B > A > C |
Subtopic: Concentration Terms & Henry's Law |
61%
Level 2: 60%+
NEET - 2024
Hints
The plot of osmotic pressure \((\pi)\) vs concentration \((mol L^{-1})\) for a solution gives a straight line with slope 25.73 L bar mol-1. The temperature at which osmotic pressure measurement is done is: \((\text {Use} \left.\mathrm{R}=0.083 \mathrm{~L} \mathrm{bar} \mathrm{mol}^{-1} \mathrm{~K}^{-1}\right)\)
| 1. | 310°C | 2. | 25.73°C |
| 3. | 12.05 °C | 4. | 37°C |
Subtopic: Osmosis & Osmotic Pressure |
53%
Level 3: 35%-60%
NEET - 2024
Hints
Which of the following pair of aqueous solutions will have the same value of osmotic pressure?
(Assume complete dissociation in aqueous solution)
1. \(0.1~ \mathrm{{M}~ {BaCl}_2} \text { and } 0.2 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
2. \(0.1~ \mathrm{{M}~ {Na}_3 {PO}_4} \text { and } 0.1 ~\mathrm{{M}~ {K}_2 {SO}_4}\)
3. \(0.2~ \mathrm{{M}~ {NaCl}} \text { and } 0.1 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
4. \(0.2 ~\mathrm{{M} ~{NaCl}} \text { and } 0.1~ \mathrm{{M} ~{K}_3\left[{Fe}({CN})_6\right]}\)
(Assume complete dissociation in aqueous solution)
1. \(0.1~ \mathrm{{M}~ {BaCl}_2} \text { and } 0.2 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
2. \(0.1~ \mathrm{{M}~ {Na}_3 {PO}_4} \text { and } 0.1 ~\mathrm{{M}~ {K}_2 {SO}_4}\)
3. \(0.2~ \mathrm{{M}~ {NaCl}} \text { and } 0.1 ~\mathrm{{M} ~{K}_2 {SO}_4}\)
4. \(0.2 ~\mathrm{{M} ~{NaCl}} \text { and } 0.1~ \mathrm{{M} ~{K}_3\left[{Fe}({CN})_6\right]}\)
Subtopic: Osmosis & Osmotic Pressure |
70%
Level 2: 60%+
NEET - 2024
Hints
Match the equilibrium processes in List-I with their respective physical properties in List-II and choose the correct option:
Choose the correct answer from the options given below:
1. A-II, B-I, C-III, D-IV
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-I, D-IV
4. A-II, B-I, C-III, D-V
| List-I (Equilibrium Process) |
List-II (Physical Properties) |
||
| A. | \(Liquid \rightleftharpoons Vapour\) | I. | Melting point |
| B. | \(Solid \rightleftharpoons Liquid\) | II. | Boiling point |
| C. | \(Solid \rightleftharpoons Vapour\) | III. | Sublimation point |
| D. | \(\small {Solute (solid) \rightleftharpoons Solute (solution)}\) | IV. | Saturated solution |
| V. | Unsaturated solution |
1. A-II, B-I, C-III, D-IV
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-I, D-IV
4. A-II, B-I, C-III, D-V
Subtopic: Introduction & Colligative properties |
73%
Level 2: 60%+
NEET - 2024
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