The Henry's law constant KH values of three gases (A, B, C) in water are 145, 2 × 10-5 and 35 kbar, respectively. The solubility of these gases in water follow the order:
1. B > C > A
2. A > C > B
3. A > B > C
4. B > A > C
Subtopic:  Concentration Terms & Henry's Law |
From NCERT
NEET - 2024
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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 |
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NEET - 2024
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Which of the following pair of aqueous solutions will have the same value of osmotic pressure? (Assume complete dissociation in aqueous solution)

1. \(0.1~ \mathrm{M}~ \mathrm{BaCl}_2 \text { and } 0.2 ~\mathrm{M} ~\mathrm{K}_2 \mathrm{SO}_4\)
2. \(0.1~ \mathrm{M}~ \mathrm{Na}_3 \mathrm{PO}_4 \text { and } 0.1 ~\mathrm{M}~ \mathrm{K}_2 \mathrm{SO}_4\)
3. \(0.2~ \mathrm{M}~ \mathrm{NaCl} \text { and } 0.1 ~\mathrm{M} ~\mathrm{K}_2 \mathrm{SO}_4\)
4. \(0.2 ~\mathrm{M} ~\mathrm{NaCl} \text { and } 0.1~ \mathrm{M} ~\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]\)
Subtopic:  Osmosis & Osmotic Pressure |
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NEET - 2024
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Match List-I with List-II 
List-I
(Reagent)
List-II
(Name of the reaction)
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 
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
Subtopic:  Introduction & Colligative properties |
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From NCERT
NEET - 2024
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When 5 g of non-volatile non-electrolyte solute is dissolved in 100 g of a certain solvent, the freezing point of the solvent decreases by 0.25 K. The molar mass of the solute is:
\([\text{K}_f \) of the given solvent \( =1.2 \mathrm{K ~kg}~ \mathrm{mol}^{-1}] \)

1. \(242.8 \mathrm{~g} \mathrm{~mol}^{-1}\)
2. \(238.2 \mathrm{~g} \mathrm{~mol}^{-1}\)
3. \(241.8 \mathrm{~g} \mathrm{~mol}^{-1}\)
4. \(240.0 \mathrm{~g} \mathrm{~mol}^{-1}\)
Subtopic:  Depression of Freezing Point |
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From NCERT
NEET - 2024
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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 |
From NCERT
NEET - 2023
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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. 1 M NaCl
Subtopic:  Van’t Hoff Factor |
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From NCERT
NEET - 2023
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One molal solution contains 0.5 moles of a solute in:
 
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 |
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From NCERT
NEET - 2022
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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 |
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NEET - 2022
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KH value for some gases at the same temperature 'T' are given:
gas KH/k bar
Ar 40.3
CO2 1.67
HCHO 1.83 × 10–5
CH4 0.413
KH is Henry's Law constant in water. The order of their solubility in water is :
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 |
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NEET - 2022
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