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Q. No.For a living cell, osmotic pressure is 12 atm at 300K, which is isotonic with NaCl(aq.) solution then strength of NaCl solution is \(x\times 10^{-2} g/L\); find the value of \(x\) in nearest integer:
[ R= 0.08 L-atm/mol-K]
1. 1246
2. 1462
3. 1602
4. 1200
Subtopic: Osmosis & Osmotic Pressure |
Level 4: Below 35%
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A solution is prepared by dissolving 15 g of a non-volatile solute in 150 g of a solvent. The elevation in boiling point of the solution is 0.5 °C. If the relative lowering of vapour pressure is x × 10⁻², determine the value of x.
(Given molar mass of solvent = 300 gm/mole, Kb = 5 K-kg/mol)
1. 3
2. 6
3. 9
4. 15
(Given molar mass of solvent = 300 gm/mole, Kb = 5 K-kg/mol)
1. 3
2. 6
3. 9
4. 15
Subtopic: Elevation of Boiling Point |
Level 4: Below 35%
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If pure liquids A and B have a vapour pressure of 55 kPa and 15 kPa respectively. If in a solution of A and B, mole fraction of A in vapour is 0.8, then find mole fraction of A in liquid phase ?
1. 0.813
2. 0.5217
3. 0.407
4. 0.363
1. 0.813
2. 0.5217
3. 0.407
4. 0.363
Subtopic: Raoult's Law |
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Two solutes, 0.3 gm of A (Mw = 60 gm/mol) and 0.9 gm of B (Mw = 180 gm/mol) are dissolved in 100 ml solution. Find the osmotic pressure of solution at 300 K (in atm):
(Use: R = 0.082 atm-L/mol-K)
1. 1.23
2. 2.46
3. 4.92
4. 3.69
(Use: R = 0.082 atm-L/mol-K)
1. 1.23
2. 2.46
3. 4.92
4. 3.69
Subtopic: Osmosis & Osmotic Pressure |
Level 4: Below 35%
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Find the mole fraction of a non-volatile electrolyte solute when W g of the solute is dissolved in 100 mL of water.
The vapour pressures of pure water and the solution are 640 mm Hg and 600 mm Hg, respectively.
The boiling point of the solution is 375 K.
Given:
Kᵦ(H₂O) = 0.52 K kg mol⁻¹
Molar mass of solute = M g mol⁻¹
Select the correct expression for Xₛₒₗᵤₜₑ:
1. 1.3/8 (W/M)2. 8/1.3 (W/M)
3. 2.6/16 (M/W)
4. 1.3/8 (M/W)
Subtopic: Elevation of Boiling Point |
Level 4: Below 35%
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If percentage of \(N_2\) above a liquid solution is 80% at a total pressure of 10 atm then find the mole fraction of \(N_2\) gas dissolved in solution: [Given that Henry’s constant for \(N_2\) is \(7.6 \times 10^7\) mm Hg].
1. \(10^{-4}\)
2. \(8 \times 10^{-5}\)
3. \(10^{-7}\)
4. \(10^{-6}\)
1. \(10^{-4}\)
2. \(8 \times 10^{-5}\)
3. \(10^{-7}\)
4. \(10^{-6}\)
Subtopic: Concentration Terms & Henry's Law |
Level 4: Below 35%
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Which of the following graph is correct between \(\log \mathrm{P}_{\mathrm{CO}_2}~ \mathrm{v} / \mathrm{s} ~\log \mathrm{X}_{\mathrm{CO}_2}?\)
[Given \(\mathrm{P}_{\mathrm{CO}_2}=\) Partial Pressure of \(\mathrm{CO}_2, \mathrm{X}_{\mathrm{CO}_2}=\) Mole fraction of \(CO_2\) in solution]
[Given \(\mathrm{P}_{\mathrm{CO}_2}=\) Partial Pressure of \(\mathrm{CO}_2, \mathrm{X}_{\mathrm{CO}_2}=\) Mole fraction of \(CO_2\) in solution]
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2. |  |
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4. |  |
Subtopic: Concentration Terms & Henry's Law |
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Level 2: 60%+
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Given below are two statements:
1. Both statements are correct
2. Statement-I correct ; Statement-II incorrect
3. Statement-II correct; Statement-I incorrect
4. Both statements are incorrect
| Statement-I: | \(K_{H}\) for ideal dilute solution does not change with varying the concentration of solute. |
| Statement-II: | \(K_{H}\) for solution having same gas solute is independent of nature of solvent? |
1. Both statements are correct
2. Statement-I correct ; Statement-II incorrect
3. Statement-II correct; Statement-I incorrect
4. Both statements are incorrect
Subtopic: Concentration Terms & Henry's Law |
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Level 3: 35%-60%
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3 moles of liquid A and 1 mole of liquid B are mixed to form an ideal solution. The vapour pressure of solution becomes 500 mm Hg. If 1 mole of A is further added then vapour pressure of solution increases by 20 mm Hg.
Find vapour pressure of pure \(B (P°_B )\) in mm Hg:
1. 200
2. 280
3. 340
4. 400
Find vapour pressure of pure \(B (P°_B )\) in mm Hg:
1. 200
2. 280
3. 340
4. 400
Subtopic: Raoult's Law |
69%
Level 2: 60%+
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Which of the following is the correct graph for the mixture of the volatile liquid \(CS_2\) and acetone?
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2. |  |
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4. |  |
Subtopic: Relative Lowering of Vapour Pressure | Raoult's Law |
79%
Level 2: 60%+
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