Q. No.A living cell has an osmotic pressure of 12 atm at 300 K. A NaCl(aq) solution is isotonic with the cell. If the strength of the NaCl solution is expressed as x × 10⁻² g L⁻¹, calculate the nearest integer value of x.
Given: R = 0.08 L atm mol⁻¹ K⁻¹
1. 1246
2. 1462
3. 1602
4. 1200
Subtopic: Osmosis & Osmotic Pressure |
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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 |
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Observe the following diagram:
For reverse osmosis, which of the following can be used for a porous membrane?
For reverse osmosis, which of the following can be used for a porous membrane?
| 1. | Cellulose acetate | 2. | Porous silicate |
| 3. | Silicone | 4. | Glass membrane |
Subtopic: Osmosis & Osmotic Pressure |
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A 0.03 M aqueous solution of a weak acid HX has an acid dissociation constant \(K_a = 1.2 \times 10^{-5}\), for the dissociation\(\mathrm{HX}_{(\mathrm{aq})} \rightleftharpoons \mathrm{H}_{(\mathrm{aq})}^{+}+\mathrm{X}_{(\mathrm{aq})}^{-} \). Calculate the osmotic pressure (in atm) of the solution at 300 K.
| 1. | 4 atm | 2. | 2 atm |
| 3. | 1 atm | 4. | 6 atm |
Subtopic: Osmosis & Osmotic Pressure | Van’t Hoff Factor |
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The osmotic pressure of a solution is \(7\times10^5 ~\text{Pa}\) at 273 K and \(\text{x}\times10^4 ~\text{Pa}\) at 283 K. The value of \(\text{x}\) is:
| 1. | 89 | 2. | 73 |
| 3. | 90 | 4. | 67 |
Subtopic: Osmosis & Osmotic Pressure |
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Which of the following option contains the correct graph between π/c and c at a constant temperature?
(Where π is osmotic pressure and c is a concentration of the solute)
(Where π is osmotic pressure and c is a concentration of the solute)
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Osmosis & Osmotic Pressure |
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What is the concentration of a glucose solution in intravenous injection in gram/lit which is isotonic with blood solution which has osmotic pressure 7.93 bar at 300 K ?
1. 62 g/L
2. 0.58 g/L
3. 0.62 g/L
4. 58 g/L
1. 62 g/L
2. 0.58 g/L
3. 0.62 g/L
4. 58 g/L
Subtopic: Osmosis & Osmotic Pressure |
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2.5 grams of protein dissolves in 500 grams of water at 300 K. If the observed value of osmotic pressure is 0.410 atm. Then the number of glycine units present in protein is:
[Given: Molar mass of glycine = 75 g/mol and R = 0.082 atm L/K mol]
1. Six
2. Four
3. Eight
4. Ten
[Given: Molar mass of glycine = 75 g/mol and R = 0.082 atm L/K mol]
1. Six
2. Four
3. Eight
4. Ten
Subtopic: Osmosis & Osmotic Pressure |
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The osmotic pressure exerted by a solution prepared by dissolving 10 g of protein of molar mass \(60 \text { g mol}^{-1}\) in 200 mL of water at 27°C will be:
(Use \(R = 0.083 \text {L bar mol}^{-1} K^{-1}\))
1. 22.5 atm
2. 20.5 atm
3. 18. 5 atm
4. 24.5 atm
(Use \(R = 0.083 \text {L bar mol}^{-1} K^{-1}\))
1. 22.5 atm
2. 20.5 atm
3. 18. 5 atm
4. 24.5 atm
Subtopic: Osmosis & Osmotic Pressure |
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Given below are two statements:
| Assertion (A): | Dissolved substances can be removed from a colloidal solution by diffusion through a parchment paper. |
| Reason (R): | Particles in a true solution cannot pass through parchment paper but the colloidal particles can pass through the parchment paper. |
| 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 |
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